Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
te sach » toc sach
cam luc » cau luc
tai cuu » tai cuc, tai buu, tai cua
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) ky dang xay hoi. hieu ve ((cam luc) or (cam xuc)) van hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ky dang xay hoi. hieu ve ((cam luc) OR (cam xuc)) van hanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ky dang xay hoi. hieu ve ((cam luc) or (cam xuc)) van hanh tai cuu tre*.