Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang thi » hoang thi, dang khoi
sach ky » sac ky, sach y, sach ty
dan cac » dan cach, dang cac, dan ca
van bac » van ban, van bao, van hac
va dang » van dang, va nang, va lang
thi cua » thai cua, thi cuc, tri cua
cua tre » cua te, cuu tre, cua triet
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: thu sach ky nang x hoi. thien ((dan cac) or (van bac)) nuoc va dang thi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. thien ((dan cac) OR (van bac)) nuoc va dang thi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. thien ((dan cac) or (van bac)) nuoc va dang thi cua tre*.