Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu va » lieu va, hieu qua
cao suc » cao su, cao duc
suc van » su van, duc van, luc van
hanh de » hanh ve, hanh kem
de cua » le cua, te cua, dieu cua
cua tu » cua tuc, cua su, cua cu
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: thuat sach ky nang x hoi. ((hieu ve) or (hieu va)) cao suc van hanh de cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang x hoi. ((hieu ve) OR (hieu va)) cao suc van hanh de cua tu.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang x hoi. ((hieu ve) or (hieu va)) cao suc van hanh de cua tu*.