Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
luc van » luoc van, luu van, duc van
hieu ve » hieu van
hanh de » hanh ve
hieu va » lieu va, hieu qua
cao luc » bao luc, cao duc, cao suc
y nang » ky nang, ly nang, v nang
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: thuat sach y nang x hoi. ((hieu ve) or (hieu va)) cao luc van ((hanh de) OR (hanh kem)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang x hoi. ((hieu ve) OR (hieu va)) cao luc van ((hanh de) OR (hanh kem)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang x hoi. ((hieu ve) or (hieu va)) cao luc van ((hanh de) OR (hanh kem)) cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang x hoi. ((hieu ve) or (hieu va)) cao luc van ((hanh de) OR (hanh kem)) cua te*.