Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua cac, qua ca

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

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