Perhaps you should try some spelling variations:
thuat sach » thuat san
thuat lanh » thuat lap, thuat san
cao luc » bao luc, cao duc, cao suc
kem cua » em cua, keo cua, diem cua
anh kem » hanh kem, anh kiem, banh kem
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
luc van » luoc van, luu van, duc van
cua te » cua tu
y nang » ky nang, ly nang, v nang

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) OR (thuat lanh)) y nang x ho. ((hieu ve) or (lieu va)) cao luc van anh kem cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat lanh)) y nang x ho. ((hieu ve) OR (lieu va)) cao luc van anh kem cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat lanh)) y nang x ho. ((hieu ve) or (lieu va)) cao luc van anh kem cua te".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) OR (thuat lanh)) y nang x ho. ((hieu ve) or (lieu va)) cao luc van anh kem cua te*.