Perhaps you should try some spelling variations:
chua tre » chua tri, cua tre, chua trieu
sach ky » sac ky, sach y, sach ty
vi chua » va chua, vi khuan, chi chua
ve cham » va cham, ve chat, vu cham
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ve cam » ve cac, va cam, ve cai
ma hoi » mai hoi, xa hoi, ma hoa
xac va » tac va, ac va, bac va
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 ky sang ma hoi. hieu ((ve cam) or (ve cham)) ((xac va) or (tuc va)) hanh vi chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ma hoi. hieu ((ve cam) OR (ve cham)) ((xac va) OR (tuc va)) hanh vi chua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ma hoi. hieu ((ve cam) or (ve cham)) ((xac va) or (tuc va)) hanh vi chua tre*.