Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
dung cong » dung trong
cong dung » cuong dung, cong dong, cong luong
dung tran » dung trang, dung tren, hung tran
tam dung » tam duong, tac dung, tan dung
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi ((dieu hanh) or (chieu sach)) - hanh trung tam dung cong dung tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((dieu hanh) OR (chieu sach)) - hanh trung tam dung cong dung tran cao.
• Adding a wildcard symbol may retrieve word variants: hoi ((dieu hanh) or (chieu sach)) - hanh trung tam dung cong dung tran cao*.