Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chiet tach » chieu sach
doi chiet » doi chieu, doi chi, doi viet
tran chau » tranh chap, tran huu
thong va » thong cua, truong va, thong qua
cong tan » cong tac, cong san, cong thanh
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh ((tang va) or (thong va)) nhung cong tan tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh ((tang va) OR (thong va)) nhung cong tan tran chau*.