Perhaps you should try some spelling variations:
theo dien » theo tieu, thu dien, thuy dien
dien sach » dien anh
hanh tang » hanh trang, hanh mang, hanh tung
anh tang » anh bang, anh dang, anh nang
dan dung » van dung, tin dung, ap dung
cong dan » cong san, cong tan, cong dong
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo dien sach - ((hanh tang) or (anh tang)) dan dung ((cong dan) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo dien sach - ((hanh tang) OR (anh tang)) dan dung ((cong dan) OR (huong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: theo dien sach - ((hanh tang) or (anh tang)) dan dung ((cong dan) or (huong dan)) toan cao*.