Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cham xuc » chat xuc, cham soc, pham duc
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
xay hoi » xa hoi, tay hoi, cay phoi
sach 2 » sach y
2 dang » 2 danh, _ dang, b dang

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 2 dang xay hoi. hieu qua ((cham xuc) OR (cam xuc)) van hanh dai cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 2 dang xay hoi. hieu qua ((cham xuc) OR (cam xuc)) van hanh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach 2 dang xay hoi. hieu qua ((cham xuc) OR (cam xuc)) van hanh dai cua viet*.