Perhaps you should try some spelling variations:
trinh phuong » trinh duong, trinh dung, trinh cong
trinh nhung » trinh dung
anh xquang » anh quang, anh quan, anh xuan
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (nhieu tang)) - anh xquang ((trinh nhung) OR (trinh phuong)) cong tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (nhieu tang)) - anh xquang ((trinh nhung) OR (trinh phuong)) cong tan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) or (nhieu tang)) - anh xquang ((trinh nhung) OR (trinh phuong)) cong tan toan tap".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (nhieu tang)) - anh xquang ((trinh nhung) OR (trinh phuong)) cong tan toan tap*.