Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
xuc van » duc van, luc van, vuc van
cau xuc » cam xuc, cau luc, cau truc
tu sach » thu sach, te sach, tu cach
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
v nang » va nang, vu nang, van nang
doi va » hoi va, noi va, dai va
di va » dai va, di vao, di vat

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) or (su sach)) v nang cao hoi. hieu van cau xuc van hanh ((di va) OR (doi va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) v nang cao hoi. hieu van cau xuc van hanh ((di va) OR (doi va)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) v nang cao hoi. hieu van cau xuc van hanh ((di va) OR (doi va)) triet*".