Perhaps you should try some spelling variations:
sach thuat » sach tham, dich thuat, cac thuat
thuat nang » thuat bang, thuat mang, thuat trang
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nam xuc » cam xuc, nam xua, nam thuc
xuc ban » duc ban, cuc ban, quoc ban
ban ban » ban banh, van ban, can ban
cua tre » cuu tre, cua triet, dua tren
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.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thuat nang x hoi. hieu van nam xuc ban ban va ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thuat nang x hoi. hieu van nam xuc ban ban va ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach thuat nang x hoi. hieu van nam xuc ban ban va ((cua tre) or (cua te))*.