Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
lieu van » hieu van, sieu van, lieu nano
pham cuc » pham chuc, pham duc, pham cua
ban hanh » ban hang
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
cua tuc » cua duc, cua tu, cua thuoc
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: thu sach tru nang x hoi. ((lieu van) or (lieu va)) pham cuc ban hanh vi ((cua tre) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tru nang x hoi. ((lieu van) OR (lieu va)) pham cuc ban hanh vi ((cua tre) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: thu sach tru nang x hoi. ((lieu van) or (lieu va)) pham cuc ban hanh vi ((cua tre) or (cua tuc))*.