Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tung » thanh tung, manh tung, hanh dung
cua nhung » va nhung
trong van » trong cac
hoc hieu » hoc thieu, hoc hien, doc hieu
dang van » hoang van, hang va
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: hoc hieu lang - ((hanh tung) or (canh tranh)) cua nhung ((trong van) or (dang van)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((hanh tung) OR (canh tranh)) cua nhung ((trong van) OR (dang van)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((hanh tung) or (canh tranh)) cua nhung ((trong van) or (dang van)) toan cau*.