Perhaps you should try some spelling variations:
ban banh » ban hanh, ban anh, ban danh
hieu van » hieu va, thien van, hieu ve
sach ty » sach y, sach tu, sach thu
xuc ban » duc ban, cuc ban, quoc ban
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
vi su » va su, ki su, oi su
ve su » va su

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 ty nang o hoi. ((hieu van) or (lieu va)) cam xuc ban banh ((vi su) OR (ve su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang o hoi. ((hieu van) OR (lieu va)) cam xuc ban banh ((vi su) OR (ve su)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang o hoi. ((hieu van) or (lieu va)) cam xuc ban banh ((vi su) OR (ve su)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang o hoi. ((hieu van) or (lieu va)) cam xuc ban banh ((vi su) OR (ve su)) triet*.