Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh huong, thanh cuong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
dong thanh » truong thanh
hoc chieu » hoc thieu, ho chieu, hoc hien
ho nhung » cho nhung, hoa nhung, hoc nhung
cong tan » cong tac, cong san, cong thanh
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: hoc chieu sang - ((thanh tuong) OR (thanh tung)) ho nhung ((cong tan) or (dong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - ((thanh tuong) OR (thanh tung)) ho nhung ((cong tan) OR (dong thanh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - ((thanh tuong) OR (thanh tung)) ho nhung ((cong tan) or (dong thanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - ((thanh tuong) OR (thanh tung)) ho nhung ((cong tan) or (dong thanh)) toan tap*.