Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van chi » van chien, luan chi, van chat
van hai » van ha, van chat, van hanh
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang xa hoi. hieu ((van chi) or (van hai)) dat va hanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. hieu ((van chi) OR (van hai)) dat va hanh di cua vat.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu ((van chi) or (van hai)) dat va hanh di cua vat*.