Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, ve cai
va cam » va cac, va cao, va cai
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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 ((ve cam) or (((va cam) or (va cham)))) xuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. hieu ((ve cam) OR (((va cam) OR (va cham)))) xuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu ((ve cam) or (((va cam) or (va cham)))) xuc va hanh vi cua tre*.