Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
cong tinh » cong trinh, cong vinh, long tinh
trang ha » trang va, tang ha, trang cham
trung ha » trung hoc, trung tam, trung cap
toan cau » 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 sang)) - hanh ((trang ha) or (trung ha)) nhung cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - hanh ((trang ha) OR (trung ha)) nhung cong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sang)) - hanh ((trang ha) or (trung ha)) nhung cong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sang)) - hanh ((trang ha) or (trung ha)) nhung cong tinh toan cau*.