Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tang » hanh trang, anh tang, hanh mang
luan dong » luan cong, quan dong, luan nong
dong cong » duong cong, dung cong, dang cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (theo tieu)) sach - ((hanh tang) or (hanh trinh)) luan dong cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (theo tieu)) sach - ((hanh tang) OR (hanh trinh)) luan dong cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (theo tieu)) sach - ((hanh tang) or (hanh trinh)) luan dong cong dan toan tap*.