Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong dinh » phuong binh, phuong linh, phuong trinh
chieu sang » chieu sach, chieu xanh, hieu lang
hoc truong » hoc thuong, hoc trong, cac truong
dinh toan » tinh toan, hinh toan, minh toan
ho chieu » theo chieu, hoc thieu, doi chieu
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh trung ((hoc truong) OR (moi truong)) phuong dinh toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh trung ((hoc truong) OR (moi truong)) phuong dinh toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung ((hoc truong) OR (moi truong)) phuong dinh toan tap*.