Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
thuc ban » thuoc ban, thuc dan, thu ban
thanh vi » hanh vi, thanh va, nhanh vi
thanh ve » hanh ve, thanh va, thanh vien
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
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: vu sach ky lang xa hoi. lieu va cac thuc ban ((thanh vi) or (thanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. lieu va cac thuc ban ((thanh vi) OR (thanh ve)) cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. lieu va cac thuc ban ((thanh vi) or (thanh ve)) cua tre*.