Perhaps you should try some spelling variations:
canh trang » canh tranh, hanh trang, banh trang
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
trang va » tran van, hang va
van tuan » van quan, van ban, anh tuan
van tan » van ban, van tai, van thanh

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)) - canh trang va nhung cong ((van tan) OR (van tuan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (nhieu tang)) - canh trang va nhung cong ((van tan) OR (van tuan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) or (nhieu tang)) - canh trang va nhung cong ((van tan) OR (van tuan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (nhieu tang)) - canh trang va nhung cong ((van tan) OR (van tuan)) ban*.