Perhaps you should try some spelling variations:
luan chung » luan chinh
hanh trinh » canh tranh, hanh chinh
hien hanh » dieu hanh
cua chung » cua nhung, luat chung, cua cong
cuong dan » cuong danh, huong dan, cong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 ((cua chung) or (luan chung)) cuong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh trinh ((cua chung) OR (luan chung)) cuong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh trinh ((cua chung) or (luan chung)) cuong dan toan tap*.