Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
chiet tach » chieu sach
tuan duong » tuyen duong, tuong duong
van duong » van dong, van dung, van phong
cong tap » cuong tap, cong tac, cong tan
tap doan » tap quan
doan dau » doan dieu, phan dau, doan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((nhieu tang) or (chiet tach)) - anh tuan ((tuan duong) OR (van duong)) cong tap doan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (chiet tach)) - anh tuan ((tuan duong) OR (van duong)) cong tap doan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) or (chiet tach)) - anh tuan ((tuan duong) OR (van duong)) cong tap doan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (chiet tach)) - anh tuan ((tuan duong) OR (van duong)) cong tap doan dau*.