Perhaps you should try some spelling variations:
dinh cuu » dinh chi
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
va tinh » may tinh
cau tuc » cau truc, cau tu, cau luc
hieu va » lieu va, hieu qua
hieu ve » hieu van
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, truc va, tuc xa
di cuu » di cau, di cua
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. ((hieu ve) OR (hieu va)) cau tuc va tinh ((di cuu) OR (dinh cuu)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. ((hieu ve) or (hieu va)) cau tuc va tinh ((di cuu) OR (dinh cuu)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. ((hieu ve) or (hieu va)) cau tuc va tinh ((di cuu) OR (dinh cuu)) tre*.