Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
nhung don » nhung van, nhung bo
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap

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