Perhaps you should try some spelling variations:
hang cong » dang cong, hang nong, bang cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban
tung va » tuong va, dung va, vung va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - thanh ((tung va) or (trung va)) hang cong dan ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - thanh ((tung va) OR (trung va)) hang cong dan ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - thanh ((tung va) or (trung va)) hang cong dan ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh ((tung va) or (trung va)) hang cong dan ((toan cao) OR (toan tap))*.