Perhaps you should try some spelling variations:
hien tinh » khien tinh, thien tinh, dien tinh
bien tinh » bi tinh, yen tinh, diep tinh
dung cong » dung trong
cong doan » cong dan, cong hoan, dong doanh
anh tang » anh bang, anh dang, anh nang
tang qua » tang quan, tang cua, tang quy
qua dung » quang dung, su dung, qua song
phan cac » nhan cach, phan dau, phan van
phan lap » phan dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tinh) OR (bien tinh)) - anh tang qua dung cong doan ((phan cac) OR (phan lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tinh) OR (bien tinh)) - anh tang qua dung cong doan ((phan cac) or (phan lap))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tinh) OR (bien tinh)) - anh tang qua dung cong doan ((phan cac) or (phan lap))*.