Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sang tao » hang tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
sach ky » sach y, sach ty, sach kem
hieu ve » hieu van
tao hoi » tao khoi, tao boi, tay hoi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) OR (sac ky)) sang tao hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) sang tao hoi. ((hieu ve) OR (hieu va)) cam xuc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sac ky)) sang tao hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sac ky)) sang tao hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vai cua tre*.