Perhaps you should try some spelling variations:
tuan vai » tuan tai, trang vai, tuan khai
van tuan » van quan, van ban, anh tuan
vai cua » dai cua, hai cua, lai cua
soc van » hoc van, oc van, sac van
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sach ty » sach tu, sach thu, xach tay
nang ma » tang ma, sang ma, mang may
cua tre » cua te, cuu tre, cua triet

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) OR (nang cao)) hoi. hieu vu cham 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) OR (nang cao)) hoi. hieu vu cham 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) OR (nang cao)) hoi. hieu vu cham soc van tuan vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) ((nang ma) OR (nang cao)) hoi. hieu vu cham soc van tuan vai cua tre*.