Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
xuc van » duc van, luc van, vuc van
doi cua » dai cua, hoi 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) OR (su 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) OR (su sach)) ky nang x ho. hieu van cam xuc van hanh ((di cua) OR (doi cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su 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) OR (su sach)) ky nang x ho. hieu van cam xuc van hanh ((di cua) or (doi cua)) vat*.