Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » va thanh, va danh, ban hanh
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang xa hoi. hieu va cam tu ((va hanh) OR (van hanh)) vi ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang xa hoi. hieu va cam tu ((va hanh) OR (van hanh)) vi ((su triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang xa hoi. hieu va cam tu ((va hanh) OR (van hanh)) vi ((su triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang xa hoi. hieu va cam tu ((va hanh) OR (van hanh)) vi ((su triet) or (va triet))*.