Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
tan thanh » tran thanh, tang thanh, toan thanh
thanh cao » thanh ca, thanh cac, thanh thao
va thong » va thuong, he thong, va cong
cong tan » cong tac, cong san, cong thanh

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 - ((thanh tung) or (thanh cong)) ((va thong) OR (va phuong)) cong tan thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((thanh tung) OR (thanh cong)) ((va thong) OR (va phuong)) cong tan thanh cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - ((thanh tung) or (thanh cong)) ((va thong) OR (va phuong)) cong tan thanh cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((thanh tung) or (thanh cong)) ((va thong) OR (va phuong)) cong tan thanh cao*.