Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu sach » chinh sach, chiet tach, chieu sang
hanh dung » thanh dung, anh dung, hanh dong
luan dung » lan dung, luan hung, luan ung
luan dong » luan cong, quan dong, luan nong
van khang » van khanh, van thanh, van quang
khang cau » hang cau, khang cu, khang chan
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((nhieu tang) or (chieu sach)) - hanh dung ((luan dung) OR (luan dong)) cong van khang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((nhieu tang) OR (chieu sach)) - hanh dung ((luan dung) OR (luan dong)) cong van khang cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((nhieu tang) or (chieu sach)) - hanh dung ((luan dung) OR (luan dong)) cong van khang cau".
• Adding a wildcard symbol may retrieve word variants: theo ((nhieu tang) or (chieu sach)) - hanh dung ((luan dung) OR (luan dong)) cong van khang cau*.