Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hoang manh » hoang minh, hoang anh, hoang xanh
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » hieu quang, nhieu tang, hieu van
cong danh » cuong danh, cong dan, cong khanh
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
tuan tap » toan tap, tuan tai, tuyen tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (hieu lang)) - hoang manh cua dung ((cong danh) OR (cong thanh)) tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - hoang manh cua dung ((cong danh) OR (cong thanh)) tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu lang)) - hoang manh cua dung ((cong danh) OR (cong thanh)) tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - hoang manh cua dung ((cong danh) OR (cong thanh)) tuan tap*.