Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
thi hang » thi hanh, thi nang, thi hong
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thu hang
tuc va » thuc va, truc va, tuc xa

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 hang) OR (thi hang)) xa hoi. ((hieu va) or (hieu van)) cam tuc va hanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty hang) OR (thi hang)) xa hoi. ((hieu va) OR (hieu van)) cam tuc va hanh vai cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty hang) OR (thi hang)) xa hoi. ((hieu va) or (hieu van)) cam tuc va hanh vai cua vat*".