Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
than duc » tran duc, phan duc, than doc
tu sach » thu sach, su sach, te sach
va than » va thanh, van than, va phan
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
vi va » vai va, vu va, bi va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) OR (v nang)) x hoi. lieu va than duc van thanh ((vi va) or (vi van)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) x hoi. lieu va than duc van thanh ((vi va) OR (vi van)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (v nang)) x hoi. lieu va than duc van thanh ((vi va) or (vi van)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (v nang)) x hoi. lieu va than duc van thanh ((vi va) or (vi van)) triet*.