Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, tong cong, phong chong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
tan than » tan thanh, tan tran, ban 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: hoc thieu sach - manh ((trung cua) or (trung cap)) ((thong cong) or (thong thong)) tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - manh ((trung cua) OR (trung cap)) ((thong cong) OR (thong thong)) tan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - manh ((trung cua) or (trung cap)) ((thong cong) or (thong thong)) tan than cao*.