Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
cua nhung » va nhung
cuong tap » luong tap, cong tac, luong tai
anh bang » anh hoang, anh quang, tinh bang
cua dang » cua cong, cua ban
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap

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

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