Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van cau » van hau, van chat, toan cau
van dau » van dao, phan dau
va dinh » van dinh, va kinh, va tinh
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((van cau) OR (van dau)) luc va dinh ((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) OR (van dau)) luc va dinh ((de cua) or (te cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((van cau) OR (van dau)) luc va dinh ((de cua) or (te cua)) triet*.