Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh trinh » canh tranh, hanh chinh
quan van » luan van, quan va, quan luan
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau
qua ban » cua ban, qua quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) or (nhieu tang)) - hanh trinh ((quan van) or (qua ban)) cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (nhieu tang)) - hanh trinh ((quan van) OR (qua ban)) cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (nhieu tang)) - hanh trinh ((quan van) or (qua ban)) cong tan tran cau*.