Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
lang cong » dang cong, bang cong, hang cong
trung va » truong va, trang va, trung ha
ban than » ban thanh, van thanh, ban hanh
ban hang » ngan hang
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chieu sach)) - hanh trung va lang cong ((ban than) OR (ban hang)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh trung va lang cong ((ban than) OR (ban hang)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - hanh trung va lang cong ((ban than) OR (ban hang)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - hanh trung va lang cong ((ban than) OR (ban hang)) cao*.