Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
y nang » ky nang, ly nang, v nang
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: tu sach y nang xa hoi. hieu ve cam duc ((ban thanh) or (ban hanh)) ((vai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve cam duc ((ban thanh) OR (ban hanh)) ((vai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ve cam duc ((ban thanh) or (ban hanh)) ((vai cua) OR (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve cam duc ((ban thanh) or (ban hanh)) ((vai cua) OR (hai cua)) tre*.