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
dung cong » dung trong
trung va » trang va, trung ha, trung tam
cong san » cong tac
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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