Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hieu van » hieu va, thien van, lieu va
te sach » toc sach
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
ban vi » ban voi, ban va, ban ve
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: te sach thu nang x hoi. hieu van nam xuc ban ban vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang x hoi. hieu van nam xuc ban ban vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach thu nang x hoi. hieu van nam xuc ban ban vi ((cua tre) or (cua te))*.