Table 2 A series of a subject-word matrix and weight of three topics.

1

School (0.018)

Children (0.037)

Children (0.022)

2

Company (0.014)

Edit (0.033)

Time (0.020)

3

Management (0.013)

International (0.021)

Client (0.018)

4

Activities (0.013)

School (0.019)

School (0.015)

5

International (0.013)

English (0.018)

English (0.014)

6

Study abroad (0.012)

Teaching in home (0.016)

Schooling (0.012)

7

Project (0.011)

Content (0.016)

Service (0.011)

8

Japanese (0.011)

Chinese (0.015)

Fluency (0.011)

9

Chinese as a foreign language (0.011)

Tutorship (0.011)

Possess (0.010)

10

Assist (0.011)

Company (0.009)

Hours (0.009)

11

Familiar with (0.010)

Chinese (0.008)

Tutorship (0.009)

12

Arrange (0.010)

Industry (0.008)

Chinese (0.009)

13

Cooperation (0.010)

Website (0.008)

Activities (0.009)

14

Industry (0.010)

Independent (0.008)

Company (0.008)

15

Development (0.009)

Publish (0.008)

International (0.008)

16

Chinese (0.009)

Responsibility (0.008)

Sales (0.008)

17

Schooling (0.009)

Possess (0.007)

Primary school (0.008)

18

Possess (0.008)

Proficiency (0.007)

Treatment (0.008)

19

Time (0.008)

Communication (0.007)

Parents (0.008)

20

Excellent (0.008)

Spoken English (0.007)

Spoken English (0.008)

21

Standard (0.008)

Time (0.007)

Chinese (0.008)

22

Responsibility (0.008)

Schooling (0.007)

Condition (0.007)

23

Participate in (0.007)

Subject (0.007)

Welfare (0.007)

24

Participate (0.007)

Kindergarten (0.007)

Standard (0.007)

25

English (0.007)

Patience (0.007)

Teaching in home (0.007)

26

Part-time job (0.007)

Cooperate (0.007)

Content (0.007)

27

Students (0.007)

Chinese as a foreign language (0.006)

Chinese as a foreign language (0.007)

28

Organization (0.007)

Experience (0.006)

Level (0.007)

29

Children (0.007)

Manuscript (0.006)

Arrange (0.007)

30

Edit (0.006)

Assistant (0.006)

Students (0.007)