Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
cong thanh » dong thanh, cong trinh, cong tan
tieu xanh » tieu danh, chieu xanh, dieu hanh
lanh manh » lan anh, van manh, anh anh
qua dung » quang dung, su dung, qua song
cong san » cong tac
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: theo tieu xanh - ((lanh manh) OR (lanh tranh)) qua dung ((cong thanh) or (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((lanh manh) OR (lanh tranh)) qua dung ((cong thanh) OR (cong san)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - ((lanh manh) OR (lanh tranh)) qua dung ((cong thanh) or (cong san)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((lanh manh) OR (lanh tranh)) qua dung ((cong thanh) or (cong san)) toan tap*.