Perhaps you should try some spelling variations:
nhieu tang » nhiet nang
chieu sang » chieu sach, chieu xanh
canh trang » canh tranh, hanh trang, banh trang
hieu lang » hieu quang, hieu van, biet lang
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang tuan » van tuan, vong tuan, quang tuan
trang va » tran van, hang va
tuan ban » tuan bang, toan ban, luan ban
va dung » van dung, va duong, vat dung

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))) or (chieu sang)) - canh trang va dung cong vang tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu lang) OR (nhieu tang))) OR (chieu sang)) - canh trang va dung cong vang tuan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hieu lang) OR (nhieu tang))) or (chieu sang)) - canh trang va dung cong vang tuan ban*".