Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tham nhung » thi nhung
nhung cong » dung cong, thong cong, hang cong
cong tham » chong tham, cong thai, hong tham
hieu cac » hieu luc, hieu va, hieu van
cong san » cong tac
san hang » san chang, ban hang, van hang
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cac) OR (chieu sach)) - thanh cong tham nhung cong san hang ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cac) OR (chieu sach)) - thanh cong tham nhung cong san hang ca".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cac) OR (chieu sach)) - thanh cong tham nhung cong san hang ca*.