Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
thanh phan » thanh pho, thanh san, thanh toan
hanh hang » thanh hang, hang hang, hanh han
hang cong » dang cong, hang nong, bang cong
phan che » han che, phap che, phan thi
hieu ca » hieu cac, hieu cua, hieu va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu ca) or (chieu sach)) - hanh hang va hang cong thanh phan che~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu ca) OR (chieu sach)) - hanh hang va hang cong thanh phan che*.