Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tran anh » tran manh, tuan anh, tran thanh
toan anh » toan hanh, tuan anh, toan doanh
cham duc » pham duc, cham soc, pham duy
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
bai cua » ban cua, dai cua, bai ca
tu sach » thu sach, su sach, te sach
x hoi » xa hoi, o hoi, 5 hoi

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 ty nang ((x hoi) OR (x ho)). hieu ve cham duc ((toan anh) or (tran anh)) bai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((x hoi) OR (x ho)). hieu ve cham duc ((toan anh) OR (tran anh)) bai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((x hoi) OR (x ho)). hieu ve cham duc ((toan anh) or (tran anh)) bai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) OR (x ho)). hieu ve cham duc ((toan anh) or (tran anh)) bai cua viet*.