Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
tinh va » trinh van, trinh vat, tinh gia
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: ((su sach) OR (vu sach)) ky nang xa hoi. hieu vu cham duc va ((tinh va) or (tich va)) chua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu vu cham duc va ((tinh va) OR (tich va)) chua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang xa hoi. hieu vu cham duc va ((tinh va) or (tich va)) chua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky nang xa hoi. hieu vu cham duc va ((tinh va) or (tich va)) chua te*.