Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cho cua » co cua, cho ca, cho cu
chi cua » chi cuc, khi cua, cuoi cua
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va
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: tu sach ky nang x hoi. hieu ve cac ((xuc va) or (duc va)) danh ((cho cua) OR (chi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ve cac ((xuc va) OR (duc va)) danh ((cho cua) OR (chi cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ve cac ((xuc va) or (duc va)) danh ((cho cua) OR (chi cua)) tre*".