Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, tran tuan, truong thanh
hoc chieu » hoc thieu, ho chieu, hoc hien
chung van » phung van, nhung van, cung van
chung han » chung nhan, chung than, chuong han
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 - manh ((trung tuan) or (trung tam)) truong ((chung van) OR (chung han)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - manh ((trung tuan) OR (trung tam)) truong ((chung van) OR (chung han)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - manh ((trung tuan) or (trung tam)) truong ((chung van) OR (chung han)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - manh ((trung tuan) or (trung tam)) truong ((chung van) OR (chung han)) toan cao*.