Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
tu sach » thu sach, su sach, te sach
dan ban » van ban, can ban, dan ba
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
van bac » van ban, van bao, van hac
sach ly » sach y, sach lo, sach ty
van cac » van hac, van cau, dan cac
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang

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 ly nang xa hoi. thien ((van cac) OR (van bac)) dan ban thanh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. thien ((van cac) OR (van bac)) dan ban thanh ((vai cua) OR (hai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang xa hoi. thien ((van cac) OR (van bac)) dan ban thanh ((vai cua) or (hai cua)) tre*".