Perhaps you should try some spelling variations:
tranh qua » tranh cua, thanh qua, trinh qua
thi oanh » thi anh, thi thanh, thi nang
thi hanh » thi thanh
qua dung » quang dung, su dung, qua song
cong van » cong vang, song van, cong tan
cong san » cong tac
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((thi oanh) or (thi hanh)) - canh tranh qua dung ((cong van) OR (cong san)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((thi oanh) OR (thi hanh)) - canh tranh qua dung ((cong van) OR (cong san)) tuan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((thi oanh) or (thi hanh)) - canh tranh qua dung ((cong van) OR (cong san)) tuan cau*".