Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh vin » trinh van, trinh tin, trinh ven
trinh vi » trinh va, trinh ve, trinh viet
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
ha tinh » va tinh, may tinh
o ha » y ha, _ ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: o ha tinh - hanh ((trinh vi) or (trinh vin)) nhung cong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: o ha tinh - hanh ((trinh vi) OR (trinh vin)) nhung cong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: o ha tinh - hanh ((trinh vi) or (trinh vin)) nhung cong dan ((toan cao) or (toan ban))*.