Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va tinh » may tinh
va hanh » van hanh, va thanh, va danh
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu
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 ((va tinh) or (va hanh)) va cua tu~.
• 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 ((va tinh) OR (va hanh)) va cua tu.
• 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 ((va tinh) or (va hanh)) va cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) OR (x ho)). hieu ve cham duc ((va tinh) or (va hanh)) va cua tu*.