Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
ban hanh » ban hang
ve triet » va trien, su triet
su sach » so sach, vu sach
hieu vu » hieu va, hieu ve, hieu su
vu chat » va chat, ve chat, du chat
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang o hoi. hieu vu chat xuc ((van ban) or (ban hanh)) vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang o hoi. hieu vu chat xuc ((van ban) OR (ban hanh)) vi ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach v nang o hoi. hieu vu chat xuc ((van ban) or (ban hanh)) vi ve triet*.