Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, kieu tinh
thanh tung » thanh cong
quan quang » qua quang, quan quan, quat quang
chau tinh » cuu tinh, ha tinh, cua tinh
tuan bang » tuan dang, tuan hoang, thuat bang
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van 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 ((chieu tinh) OR (chau tinh)) - thanh tung ((quan quang) or (tuan bang)) cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chau tinh)) - thanh tung ((quan quang) OR (tuan bang)) cong tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) OR (chau tinh)) - thanh tung ((quan quang) or (tuan bang)) cong tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) OR (chau tinh)) - thanh tung ((quan quang) or (tuan bang)) cong tinh toan ban*.