Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
xuc van » duc van, luc van, xuc ban
doi cua » dai cua, hoi cua, dong cua
di cua » dai cua, de cua, do cua

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 ho. hieu van cam xuc van hanh ((di cua) or (doi cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x ho. hieu van cam xuc van hanh ((di cua) OR (doi cua)) vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu van cam xuc van hanh ((di cua) or (doi cua)) vat*.