Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
ganh nang » anh nang, nganh nong, van nang
anh tang » anh bang, anh dang, anh nang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu sach)) - ((anh tang) or (ganh nang)) va nhung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - ((anh tang) OR (ganh nang)) va nhung cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - ((anh tang) or (ganh nang)) va nhung cong san toan ban*.