Perhaps you should try some spelling variations:
cham duc » pham duc, pham duy, phan duc
tu sach » thu sach, su sach, te sach
va chua » vua chua, ca chua, a chua
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
sach ky » sac ky, sach y, sach ty
va tinh » may tinh
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 ky nang xa hoi. hieu vu ((cham duc) or (cham soc)) va tinh ((va chua) OR (va chu)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu vu ((cham duc) OR (cham soc)) va tinh ((va chua) OR (va chu)) 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) OR (va chu)) 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) OR (va chu)) te*.