Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
duoc luu » duoc huu, duoc lieu, duoc luan
van hanh » van thanh, ban hanh, van anh
hanh hoi » hanh thoi, hanh noi, hanh hoa
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hieu va » hieu qua
luu van » cuu van, luan van, luu hanh
hoi cua » hoi chuc
cua tuc » cua duc, cua tu, cua thuoc
hang x » nang x, hoang xa, chang xu
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 ty hang x hoi. ((hieu va) or (lieu va)) duoc luu van hanh hoi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty hang x hoi. ((hieu va) OR (lieu va)) duoc luu van hanh hoi cua tuc.
• Adding a wildcard symbol may retrieve word variants: thu sach ty hang x hoi. ((hieu va) or (lieu va)) duoc luu van hanh hoi cua tuc*.