Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tan khoan » toan khoan, tai khoan, tao khoang
khoan cam » khoa cam, khoan va, phan cam
ho chieu » theo chieu, hoc thieu, doi chieu
trung ha » trung hoc, trung tam, trung cap
cong tan » cong tac, cong san, cong thanh
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh ((tung va) or (trung ha)) trong cong tan khoan cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((tung va) OR (trung ha)) trong cong tan khoan cam*.