Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
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: theo ((hieu nganh) or (chieu tinh)) - ((hanh tang) OR (hanh mang)) va nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu nganh) OR (chieu tinh)) - ((hanh tang) OR (hanh mang)) va nhung cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu nganh) or (chieu tinh)) - ((hanh tang) OR (hanh mang)) va nhung cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu nganh) or (chieu tinh)) - ((hanh tang) OR (hanh mang)) va nhung cong dan toan tap*.