Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
hieu lang » chieu sang, hieu quang, nhieu tang
cong vang » cong lang, cong quang, cong ngang
hoc hieu » hoc thieu, hoc hien, doc hieu
vang tan » van tan, tang tan, vang tao
va nang » van nang, da nang, kha nang
tan cau » toan cau, van cau, tan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - ((hanh trang) or (hanh trinh)) ((va nang) or (cam nang)) cong vang tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((hanh trang) OR (hanh trinh)) ((va nang) OR (cam nang)) cong vang tan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((hanh trang) or (hanh trinh)) ((va nang) or (cam nang)) cong vang tan cau*.