Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
tran thong » toan thong, tran hong, tran trong
hieu manh » hieu nganh, dieu hanh, hien hanh
thong tan » thong than, thong tran, thong tin
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - ((thanh trung) OR (thanh tung)) tran thong thong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - ((thanh trung) OR (thanh tung)) tran thong thong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - ((thanh trung) OR (thanh tung)) tran thong thong tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - ((thanh trung) OR (thanh tung)) tran thong thong tan than cau*.