Perhaps you should try some spelling variations:
tu sach » thu sach, te sach, tu cach
cuc ban » cua ban, cac ban, cuu ban
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
duc ban » duc tan, duc van, dua ban
tu cua » hu cua, vu cua
anh tu » anh tuan
ve cam » ve cham, ve cac, va cam
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang x hoi. hieu ve cam ((duc ban) OR (cuc ban)) anh tu cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang x hoi. hieu ve cam ((duc ban) or (cuc ban)) anh tu cua te~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang x hoi. hieu ve cam ((duc ban) or (cuc ban)) anh tu cua te*.