Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
truong cao » truong dai
hieu manh » chieu xanh, hieu nganh, dieu hanh
tran tuan » tran xuan, tran quang, tran thanh
thong ban » thong van, trong ban, thong bai
ban phan » ban phap, van phan, ban than
phan dau » phan tu, hang dau

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 (hieu manh)) - thanh ((tran tuan) or (truong cao)) thong thong ban phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh ((tran tuan) OR (truong cao)) thong thong ban phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - thanh ((tran tuan) or (truong cao)) thong thong ban phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - thanh ((tran tuan) or (truong cao)) thong thong ban phan dau*.