Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
toc sach » hoc sach, doc sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
va thanh » gia thanh, ban thanh, va tinh
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
te cua » le cua, de cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (toc sach)) ky nang x hoi. hieu vu cham duc va thanh ((te cua) OR (tue cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (toc sach)) ky nang x hoi. hieu vu cham duc va thanh ((te cua) OR (tue cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (toc sach)) ky nang x hoi. hieu vu cham duc va thanh ((te cua) OR (tue cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (toc sach)) ky nang x hoi. hieu vu cham duc va thanh ((te cua) OR (tue cua)) te*.