Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
xuc van » duc van, luc van, xuc ban
vi cua » vai cua, di cua
tu sac » tu cac, tu san, tu bac
ma hoi » mai hoi, xa hoi, ma hoa

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

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