Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, nhung don
tranh cua » doanh cua, manh cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
hoc dieu » hoc thieu, hoc hien
dan toan » van toan, dan than, manh toan
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 dieu hanh - hanh tranh cua ((nhung cong) or (((hang cong) or (dang cong)))) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - hanh tranh cua ((nhung cong) OR (((hang cong) OR (dang cong)))) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - hanh tranh cua ((nhung cong) or (((hang cong) or (dang cong)))) dan toan cao*.