Perhaps you should try some spelling variations:
cham duc » pham duc, pham duy, phan duc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
va chua » vua chua, ca chua, va chu
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 xa hoi. hieu vu ((cham duc) OR (cham soc)) va tinh va chua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu vu ((cham duc) OR (cham soc)) va tinh va chua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu vu ((cham duc) OR (cham soc)) va tinh va chua te*.