Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va danh, ban hanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
nam tu » nam thu, nam thuc
cam tu » cam thu, dam tu, tam tu

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

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