Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
cua thuong » cua phuong, ca thuong, cua huong
cua truong » cua trung, xuan truong, cac truong
hoc thieu » toc thieu, hoc hien
dong tan » duong tan, dong tai, dong san
than cao » toan cao, than cap, than sao
thai cao » tai cao, thoai cac, thuat cao

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