Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » anh tang, hanh mang, hanh tung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: doi ((hieu manh) or (chieu sach)) - ((hanh tang) OR (hanh trang)) luan nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chieu sach)) - ((hanh tang) OR (hanh trang)) luan nhung cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (chieu sach)) - ((hanh tang) OR (hanh trang)) luan nhung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (chieu sach)) - ((hanh tang) OR (hanh trang)) luan nhung cong dan toan cao*.