Perhaps you should try some spelling variations:
chinh tham » chinh nham, chinh tai, hinh thai
hieu cach » hieu cac, chieu sach, biet cach
tham dung » pham dung, tham cung, tham nhung
dung cong » dung trong
cong san » cong tac
hieu ca » hieu cac, hieu cua, hieu va
tay cao » tao cao, tay co, toan cao
tan ca » tan cua, tang ca, dan ca

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 ((hieu cach) OR (hieu ca)) - hanh chinh tham dung cong san ((tan ca) OR (tay cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) OR (hieu ca)) - hanh chinh tham dung cong san ((tan ca) or (tay cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) OR (hieu ca)) - hanh chinh tham dung cong san ((tan ca) or (tay cao))*.