Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc khien » hoc hien, hoc nghien, hoc thieu
dan toan » van toan, dan than, manh toan
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 khien bang - hanh trinh luat ((nhung cong) or (thong cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien bang - hanh trinh luat ((nhung cong) OR (thong cong)) dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc khien bang - hanh trinh luat ((nhung cong) or (thong cong)) dan toan cau*.