Perhaps you should try some spelling variations:
thang long » thanh cong
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
hang nong » han tong
dan chan » dan gian, dan ca, van chat
chan cac » phan cac, chon cac, nhan cach

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 - canh tranh cua ((hang nong) or (thang long)) dan chan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh tranh cua ((hang nong) OR (thang long)) dan chan cac.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh tranh cua ((hang nong) or (thang long)) dan chan cac*.