Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
van cau » van dau, van hau, van chat
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
xuc va » tuc va, luc va, xac va
dam va » dam van, nam va, dam ha
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang o hoi. hieu van cau ((xuc va) or (duc va)) thanh dam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang o hoi. hieu van cau ((xuc va) OR (duc va)) thanh dam va triet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang o hoi. hieu van cau ((xuc va) or (duc va)) thanh dam va triet*.