Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » dung cong, thong cong, hang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
doanh va » doan va, doanh cua, hanh va
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu quang)) - hang ((doanh va) OR (doanh tai)) nhung cong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu quang)) - hang ((doanh va) OR (doanh tai)) nhung cong manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu quang)) - hang ((doanh va) OR (doanh tai)) nhung cong manh toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu quang)) - hang ((doanh va) OR (doanh tai)) nhung cong manh toan tap*.