Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
truong va » truong dai, truong cao, truong dao
trung va » trang va, trung ha, trung tam
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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 - thanh ((trung va) OR (truong va)) nhung ((cong dan) or (cong tan)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung va) OR (truong va)) nhung ((cong dan) OR (cong tan)) than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((trung va) OR (truong va)) nhung ((cong dan) or (cong tan)) than cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung va) OR (truong va)) nhung ((cong dan) or (cong tan)) than cao*.