Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cau tuc » cau truc, cau tu, cau luc
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, tuc xa
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dang xa hoi. hieu va cau tuc va hanh ((de cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xa hoi. hieu va cau tuc va hanh ((de cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. hieu va cau tuc va hanh ((de cua) or (hai cua)) tre*.