Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung xay » trong xay, trung gay, trung tam
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
van thanh » ban thanh, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chieu tinh)) - thanh trung xay dung cong ((manh toan) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu tinh)) - thanh trung xay dung cong ((manh toan) OR (van thanh)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu tinh)) - thanh trung xay dung cong ((manh toan) or (van thanh)) cau*.