Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
dang thanh » dong thanh, dang hanh, hoang thanh
dung cong » dung trong
vang than » sang than, van than, cang thang
trung ca » trung cap, truong ca, trung cua
ca dung » cao dung, cap dung, cu dung

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 sang)) - thanh trung ca dung cong ((vang than) or (dang thanh)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu sang)) - thanh trung ca dung cong ((vang than) OR (dang thanh)) cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu sang)) - thanh trung ca dung cong ((vang than) or (dang thanh)) cap*.