Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
bach van » bach dan, cach van, bach dang
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang ma » tang ma, sang ma, nang cao
sach va » sach xa, sach ha, sach dao
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((bach van) or (sach va)) nang ma hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((bach van) OR (sach va)) nang ma hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((bach van) or (sach va)) nang ma hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va su tien".
• Adding a wildcard symbol may retrieve word variants: tu ((bach van) or (sach va)) nang ma hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va su tien*.