Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
thien anh » thien danh, tien anh, thien thanh
thong dan » thong van, tuong dan, thong den
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
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 ((((thieu xanh) or (thien anh))) or (chieu sang)) - hanh trinh va thong thong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu xanh) OR (thien anh))) OR (chieu sang)) - hanh trinh va thong thong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu xanh) or (thien anh))) or (chieu sang)) - hanh trinh va thong thong dan toan tap*.