Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tong cong » trong cong, cong cong, dung cong
danh nhan » doanh nhan, thanh nhan, benh nhan
hanh san » khach san, thanh son, khanh son
dan nhan » dan chan, van nhan, ban nhan
va tong » va thong, va tuong, va trong

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 - ((hanh san) or (thanh san)) va tong cong ((dan nhan) OR (danh nhan)) tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh san) OR (thanh san)) va tong cong ((dan nhan) OR (danh nhan)) tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh san) or (thanh san)) va tong cong ((dan nhan) OR (danh nhan)) tai".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh san) or (thanh san)) va tong cong ((dan nhan) OR (danh nhan)) tai*.