Perhaps you should try some spelling variations:
chieu xanh » chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, hieu cach
chieu sang » hieu lang, nhieu tang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van ban
tung va » trung va, tuong va, dung va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (((chieu sach) OR (chieu sang)))) - thanh tung va nhung cong tinh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (((chieu sach) OR (chieu sang)))) - thanh tung va nhung cong tinh toan ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (((chieu sach) OR (chieu sang)))) - thanh tung va nhung cong tinh toan ban*.