Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban dan » ban hang, ban hanh, ban quan
cuc ban » cua ban, cac ban, cuu ban
va tham » van tham, va cham, va thanh
cuu tre » cua tre, cau tren, cau treo
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
ve cam » ve cham, ve cac, va cam
dan va » doan va, dan ca, ban va
va cuu » va cau, va chu, va huu

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 lang) OR (ky dang)) xa hoi. hieu ((ve cam) or (va tham)) cuc ban dan va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky lang) OR (ky dang)) xa hoi. hieu ((ve cam) OR (va tham)) cuc ban dan va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky lang) OR (ky dang)) xa hoi. hieu ((ve cam) or (va tham)) cuc ban dan va cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky lang) OR (ky dang)) xa hoi. hieu ((ve cam) or (va tham)) cuc ban dan va cuu tre*.