Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
sach tranh » canh tranh
quang dung » quang trung, ung dung, cuong dung
hieu lang » chieu sang, hieu quang, hieu van
cach manh » cach mang, cach nhanh, sach danh
dung cong » dung trong
gian thua » giai thuat, gian cua, gian ha
cong tan » cong tac, cong san, cong thanh
tan gian » tran gian, dan gian, van gian

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) OR (nhieu tang)) - ((cach manh) or (sach tranh)) quang dung cong tan gian thua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (nhieu tang)) - ((cach manh) OR (sach tranh)) quang dung cong tan gian thua.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (nhieu tang)) - ((cach manh) or (sach tranh)) quang dung cong tan gian thua".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (nhieu tang)) - ((cach manh) or (sach tranh)) quang dung cong tan gian thua*.