Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
cau xuc » cau luc, cau truc, chat xuc
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
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 sach ty nang ma hoi. hieu van ((cau xuc) OR (cam xuc)) van ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. hieu van ((cau xuc) OR (cam xuc)) van ((hanh vai) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. hieu van ((cau xuc) OR (cam xuc)) van ((hanh vai) or (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu van ((cau xuc) OR (cam xuc)) van ((hanh vai) or (hanh va)) cua tre*.