Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
vien cac » vien bach, vien dai, vien da
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, te sach
van cua » vang cua, ban cua, dan cua
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, kho tang
ve cac » va cac

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) or (toc sach)) ky tang van hoi. hieu ((ve cac) or (vien cac)) thuc va thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky tang van hoi. hieu ((ve cac) OR (vien cac)) thuc va thanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky tang van hoi. hieu ((ve cac) or (vien cac)) thuc va thanh van cua tre*.