Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
luan dong » luan cong, quan dong, luan nong
luan danh » luan thanh, luan van, luan nang
anh tang » anh bang, anh dang, anh nang
anh dong » anh huong, anh son
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((anh tang) or (anh dong)) ((luan dong) or (luan danh)) cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((anh tang) OR (anh dong)) ((luan dong) OR (luan danh)) cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((anh tang) or (anh dong)) ((luan dong) or (luan danh)) cong dan than cao*.