Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien hanh » dieu hanh
vap nhung » va nhung, voi nhung, cam nhung
ve nhung » va nhung, tu nhung
cong san » cong tac
san chan » san chang, dan chan, san chay
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - hanh trinh ((vap nhung) or (ve nhung)) cong san chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh trinh ((vap nhung) OR (ve nhung)) cong san chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh trinh ((vap nhung) or (ve nhung)) cong san chan cau*.