Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
trinh cua » tinh cua, trinh luat, trinh quan
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu cach - nhanh ((trinh cua) or (tinh chat)) nhung cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu cach - nhanh ((trinh cua) OR (tinh chat)) nhung cong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doc hieu cach - nhanh ((trinh cua) or (tinh chat)) nhung cong dan ((toan cao) or (toan tap))*.