Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
quoc ban » quoc bao, quoc lan, quoc quan
tu sach » su sach, te sach, tu cach
ban anh » ban hanh, ban banh, ban danh
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
anh te » anh tu, anh ta, anh ve
te cua » tue cua, le cua, de cua
x hoi » xa hoi, o hoi, x ho

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 (thu sach)) ty nang x hoi. hieu ((ve cham) or (ve chat)) quoc ban anh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cham) OR (ve chat)) quoc ban anh te cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty nang x hoi. hieu ((ve cham) or (ve chat)) quoc ban anh te cua tre*.