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