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
tong cong » trong cong, cong cong, dung cong
trung va » trang va, trung ha, trung tam
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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