Perhaps you should try some spelling variations:
hoc chiet » hoc nhiet, hoc hien, hoc viet
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
dang cong » dung cong
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, 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 chiet) or (hoc thiet)) tach - canh tranh cua dang cong tan tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (hoc thiet)) tach - canh tranh cua dang cong tan tran ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc chiet) or (hoc thiet)) tach - canh tranh cua dang cong tan tran ban*.