Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
van lam » van nam
sach ty » sach y, sach tu, sach thu
van cam » van nam, van cau, van dam
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 ty nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh ((vai cua) OR (lai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh ((vai cua) or (lai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh ((vai cua) or (lai cua)) tre*.