Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
nhieu tang » chieu sang, hieu lang, nhiet nang
canh trinh » canh tranh, hanh trinh, canh tinh
thong dan » tuong dan, thong den, trong dan
thong van » trong van, thong va, thong quan
thanh van » thanh san, thanh toan, thanh phan
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (nhieu tang)) - canh trinh va thong ((thong dan) or (thong van)) thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (nhieu tang)) - canh trinh va thong ((thong dan) OR (thong van)) thanh van.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (nhieu tang)) - canh trinh va thong ((thong dan) or (thong van)) thanh van*.