Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
va chua » vua chua, ca chua, a chua
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
va chu » va che, va cau, va chi

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) OR (ty hang)) xa hoi. hieu vu cham duc va thanh ((va chua) or (va chu)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu vu cham duc va thanh ((va chua) OR (va chu)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) xa hoi. hieu vu cham duc va thanh ((va chua) or (va chu)) te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu vu cham duc va thanh ((va chua) or (va chu)) te*.