Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
hieu va » lieu va, hieu qua
hanh ve » hanh vi, hanh va, hanh kem
xuc van » duc van, luc van, vuc van
cao xuc » cam xuc, cao duc, cao suc
tu sach » thu sach, su sach, tu cach
xay hoi » xa hoi, tay hoi, cay phoi
cu dang » cua dang, su dang, vu dang
te sach » toc sach
su hien » su kien, su tien, thu hien
va cao » va cac, va co, va dao
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: ((tu sach) OR (te sach)) cu dang xay hoi. hieu va cao xuc van hanh ve su hien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) cu dang xay hoi. hieu va cao xuc van hanh ve su hien".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) cu dang xay hoi. hieu va cao xuc van hanh ve su hien*.