Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
tu sach » thu sach, su sach, te sach
cau luc » cau truc, cau phuc
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, vu dinh
y nang » ky nang, ly nang, v nang
de cua » le cua, dieu cua
te cua » tue cua, le cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu van cau luc ((va dinh) OR (va tinh)) ((de cua) or (te cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van cau luc ((va dinh) OR (va tinh)) ((de cua) OR (te cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu van cau luc ((va dinh) OR (va tinh)) ((de cua) or (te cua)) triet*".