Perhaps you should try some spelling variations:
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duc van » duc va, duc tan, duc manh
minh di » minh ai, minh de, minh duc
ca viet » va viet, hoa viet, san viet
co viet » so viet, o viet, hoc viet
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky nang x hoi. hieu va pham duc van minh di ((ca viet) or (co viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang x hoi. hieu va pham duc van minh di ((ca viet) OR (co viet)).
• Adding a wildcard symbol may retrieve word variants: tu can ky nang x hoi. hieu va pham duc van minh di ((ca viet) or (co viet))*.