Perhaps you should try some spelling variations:
hanh trang » thanh trung, hanh trinh, minh trang
hieu lang » chieu sang, hieu quang, nhieu tang
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
hoi hieu » hoi phieu, hoi tieu, moi hieu
vat dung » van dung, va dung, viet dung
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - ((hanh trang) OR (canh tranh)) vat dung ((cong manh) or (cong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - ((hanh trang) OR (canh tranh)) vat dung ((cong manh) OR (cong danh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - ((hanh trang) OR (canh tranh)) vat dung ((cong manh) or (cong danh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - ((hanh trang) OR (canh tranh)) vat dung ((cong manh) or (cong danh)) toan cau*.