Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
trong he » trong le, trong hiep, trong nha
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau
tang ma » mang may, tang van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - hanh ((trong he) or (tang ma)) thong cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hanh ((trong he) OR (tang ma)) thong cong dan phan dau.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh ((trong he) or (tang ma)) thong cong dan phan dau*.