Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
tieu sang » tieu dung, tiem nang, tinh sang
tranh dap » tranh dau, trinh dap, tranh chap
dap nhung » vap nhung, va nhung, dap ung
thanh lap » thanh san, phan lap, thanh hai
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu sang) OR (chieu sang)) - canh tranh dap nhung ((huong dan) or (cong tan)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sang) OR (chieu sang)) - canh tranh dap nhung ((huong dan) OR (cong tan)) thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sang) OR (chieu sang)) - canh tranh dap nhung ((huong dan) or (cong tan)) thanh lap".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sang) OR (chieu sang)) - canh tranh dap nhung ((huong dan) or (cong tan)) thanh lap*.