Perhaps you should try some spelling variations:
dinh cuu » dinh chi
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc va
vi luu » vi lua

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 va tham ((soc va) OR (doc va)) hanh ((vi luu) or (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu va tham ((soc va) OR (doc va)) hanh ((vi luu) OR (dinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu va tham ((soc va) OR (doc va)) hanh ((vi luu) or (dinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu va tham ((soc va) OR (doc va)) hanh ((vi luu) or (dinh cuu)) tre*.