Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
cua viet » ca viet, hoa viet, cua vat
thi hanh » thi thanh
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, tu cach
hanh xa » hanh va, hanh ma, hanh xu
te sach » toc sach
hieu ve » hieu van

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)) thi hanh xa hoi. ((hieu ve) or (hieu va)) cac xuc ban thanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thi hanh xa hoi. ((hieu ve) OR (hieu va)) cac xuc ban thanh dai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) thi hanh xa hoi. ((hieu ve) or (hieu va)) cac xuc ban thanh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) thi hanh xa hoi. ((hieu ve) or (hieu va)) cac xuc ban thanh dai cua viet*.