Perhaps you should try some spelling variations:
hieu sach » chieu sach, dien sach, hieu cac
hieu cach » hieu cac, chieu sach, hieu ca
thanh thi » thanh tai, nhanh thi, thanh tri
hanh cong » thanh cong, hang cong, hanh dong
cong hung » cong chung, cong huong, cong dung
thi hanh » thi thanh
hung dan » huong dan, dung dan, tung dan
dan phan » doan phan, dan chan, van phan
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) or (hieu cach)) - thanh thi hanh cong hung dan phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (hieu cach)) - thanh thi hanh cong hung dan phan tap*.