Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
khong cong » thong cong, khong cang, chong cong
hanh tang » anh tang, hanh mang, hanh tung
cua khong » hua khong, cua phuong, cua thuong
thi canh » thi hanh, thi anh, thi oanh
cong tan » cong tac, cong san, cong thanh
tran cao » tran chau, trang cho, tranh cac
toan cao » toan ban, toan tap
doi thi » doi thoi, do thi, doi khi

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 canh - ((hanh tang) or (hanh trang)) cua khong cong tan ((tran cao) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi thi canh - ((hanh tang) OR (hanh trang)) cua khong cong tan ((tran cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi thi canh - ((hanh tang) or (hanh trang)) cua khong cong tan ((tran cao) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: doi thi canh - ((hanh tang) or (hanh trang)) cua khong cong tan ((tran cao) OR (toan cao))*.