Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
qua cau » quan cau, qua cac, qua ca
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
le cua » ly cua
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: te sach y nang x hoi. hieu qua cau luc van hanh ((vi cua) or (le cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu qua cau luc van hanh ((vi cua) OR (le cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu qua cau luc van hanh ((vi cua) or (le cua)) tre*.