Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach
va cham » va chat, va tham
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ve cham » ve chat, vu cham, ve chim
tang ma » mang may, tang van
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
y tang » ky tang, 6 tang, 7 tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) y tang ma hoi. hieu ((ve cham) or (va cham)) thuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y tang ma hoi. hieu ((ve cham) OR (va cham)) thuc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y tang ma hoi. hieu ((ve cham) or (va cham)) thuc va hanh vai cua tre*.