Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, truong van
chieu tinh » trieu tinh, lieu tinh, chau tinh
luong quan » thong quan, duong qua
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
cong tam » cong tac, cong tan, cong nam
tri cac » tri mac, tai cac, tri dac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu tinh) or (hieu lang)) - hanh ((truong quan) OR (luong quan)) dang cong tam tri cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (hieu lang)) - hanh ((truong quan) OR (luong quan)) dang cong tam tri cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) or (hieu lang)) - hanh ((truong quan) OR (luong quan)) dang cong tam tri cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) or (hieu lang)) - hanh ((truong quan) OR (luong quan)) dang cong tam tri cac*.