Perhaps you should try some spelling variations:
tuan vai » tuan tai, trang vai, tuan khai
van tuan » van quan, van ban, anh tuan
ve chat » va chat, van chat
vai cua » dai cua, hai cua, lai cua
soc van » hoc van, oc van, sac van
ve cham » va cham, vu cham, ve chim
sach ty » sach tu, sach thu, xach tay
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
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) or (sach y)) nang ma hoi. hieu ((ve cham) OR (ve chat)) soc van tuan vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang ma hoi. hieu ((ve cham) OR (ve chat)) soc van tuan vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) nang ma hoi. hieu ((ve cham) OR (ve chat)) soc van tuan vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) nang ma hoi. hieu ((ve cham) OR (ve chat)) soc van tuan vai cua tre*.