Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thong tung » thong trung, thong dung, thong cung
hanh hinh » hanh chinh, hanh tinh, hanh dinh
cua thong » cua thuong, cua khong, cua tong
hinh cua » chinh cua, sinh cua, tinh cua
tung dan » dung dan, huong dan, trung dai
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: hoc ((chieu xanh) or (chieu sach)) - hanh hinh cua thong tung dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh hinh cua thong tung dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - hanh hinh cua thong tung dan toan cao*.