Perhaps you should try some spelling variations:
tranh hoac » thanh hoach, thanh hoa, trinh hoa
hoac khong » hoa khong, hoc khong, hay khong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cong doan » cong hoan, dong doanh, cong san
hoc tien » hoc tieng, hoc hien, hoc vien
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc tien) or (hoc thiet)) thanh - canh tranh hoac khong ((cong doan) OR (cong dan)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tien) OR (hoc thiet)) thanh - canh tranh hoac khong ((cong doan) OR (cong dan)) phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc tien) or (hoc thiet)) thanh - canh tranh hoac khong ((cong doan) OR (cong dan)) phan cac".
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) or (hoc thiet)) thanh - canh tranh hoac khong ((cong doan) OR (cong dan)) phan cac*.