Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
trinh va » trinh vat, trinh ve, trinh vi
cong dan » cong san, cong tan, huong dan
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam
ho hap » hoi nhap, hoc phap
ho ha » pho ha, o ha, ho ba

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: ((ho ha) OR (ho hap)) tinh - hanh ((trinh va) OR (trinh van)) hang cong dan khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho ha) or (ho hap)) tinh - hanh ((trinh va) OR (trinh van)) hang cong dan khan cap~".
• Adding a wildcard symbol may retrieve word variants: ((ho ha) or (ho hap)) tinh - hanh ((trinh va) OR (trinh van)) hang cong dan khan cap*.