Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
cong hoach » cong hoa, cong hoan, cong sach
hoach toan » hach toan
truong va » truong dai, truong cao, truong dao
trung va » trang va, trung ha, trung tam
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) or (chieu sach)) - thanh ((trung va) OR (truong va)) nhung cong hoach toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - thanh ((trung va) OR (truong va)) nhung cong hoach toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - thanh ((trung va) OR (truong va)) nhung cong hoach toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - thanh ((trung va) OR (truong va)) nhung cong hoach toan cao*.