Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, xuc ban
vuc van » duc van, luc van, thuc van
hai cua » thai cua, hoi cua, lai cua
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang xa hoi. hieu ve cam ((xuc van) OR (vuc van)) thanh ((hai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. hieu ve cam ((xuc van) OR (vuc van)) thanh ((hai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang xa hoi. hieu ve cam ((xuc van) OR (vuc van)) thanh ((hai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. hieu ve cam ((xuc van) OR (vuc van)) thanh ((hai cua) or (dai cua)) tre*.