Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
trang cong » trong cong, trang vuong, dang cong
thanh toan » thanh hoa, thanh san, tinh toan
trung cao » truong cao, trung cap, trung co
tran cong » tran hong, trien cong, tran hoang
toan ban » van ban

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

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