Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
qua dau » qua da, qua bau, qua dan
dau qua » cau qua, rau qua, dau cua
qua van » quan van, qua ban, qua san
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
de cua » le cua, te cua, dieu cua

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 xa hoi. hieu qua dau qua van hanh ((vi cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu qua dau qua van hanh ((vi cua) OR (de cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu qua dau qua van hanh ((vi cua) or (de cua)) tre*.