Perhaps you should try some spelling variations:
cham doc » cham soc, chat doc, chau doc
va thanh » gia thanh, ban thanh, le thanh
vua chua » sua chua, cua chua, tua chua
lky nang » ly nang, ki nang, ke nang
va tinh » may tinh
tu sach » thu sach, su sach, te sach
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
chua te » cua te, chua tu, chua xe

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