Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc chinh » hoan chinh, hoc sinh, hoc kinh
hanh hang » thanh hang, hang hang, hanh han
hoang van » hang va
ca nhung » cua nhung, cam nhung, va nhung
cong dan » cong san, cong tan, huong dan
gian nan » gian dan, gian lan, gian van
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chinh sach - hanh hang ca nhung cong dan ((gian nan) or (hoang van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chinh sach - hanh hang ca nhung cong dan ((gian nan) OR (hoang van)).
• Adding a wildcard symbol may retrieve word variants: hoc chinh sach - hanh hang ca nhung cong dan ((gian nan) or (hoang van))*.