Perhaps you should try some spelling variations:
thien van » thi van
van hoai » van thoai, van hoa, van hai
hoai duc » hoa duoc, hong duc, ho duc
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
vi cua » di 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. thien van hoai duc ((va hanh) or (van hanh)) ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. thien van hoai duc ((va hanh) OR (van hanh)) ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. thien van hoai duc ((va hanh) or (van hanh)) ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. thien van hoai duc ((va hanh) or (van hanh)) ((vi cua) OR (vai cua)) tre*.