Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh van » doan van, doanh va, doanh ban
danh vai » danh sai, danh va, dang van
va nham » va tham, va nha, va kham
va cham » va chat, va tham
sach tu » sach thu, cach tu, sach ty
thu day » thuc day, thu da, thu dac
tu nang » tru nang, tu nong, tu nano
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: thuoc sach tu nang x hoi. lieu ((va nham) OR (va cham)) thu day ((danh vai) or (doanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach tu nang x hoi. lieu ((va nham) OR (va cham)) thu day ((danh vai) OR (doanh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach tu nang x hoi. lieu ((va nham) OR (va cham)) thu day ((danh vai) or (doanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach tu nang x hoi. lieu ((va nham) OR (va cham)) thu day ((danh vai) or (doanh van)) cua tre*.