Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
luan thong » luan phong, luan tuong, luat thong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
anh dung » anh dong, anh huong, sach dung
van tan » van tuan, van ban, van thanh
van tai » von tai, 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: ho ((hieu lang) or (chieu tinh)) - anh dung luan thong cong ((van tan) or (van tai)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu tinh)) - anh dung luan thong cong ((van tan) OR (van tai)) cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu tinh)) - anh dung luan thong cong ((van tan) or (van tai)) cau*.