Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
truong lop » truong hop, truong lon, truong long
cong thanh » dong thanh, cong trinh, cong tan
trung lap » trung cap, truong lam, trung tam
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
trung ap » trung cap, trung tam, trung dai
san ban » sang ban, van ban, can 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 xanh - thanh ((trung ap) or (((trung lap) OR (truong lop)))) dung cong thanh san ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh ((trung ap) OR (((trung lap) OR (truong lop)))) dung cong thanh san ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - thanh ((trung ap) or (((trung lap) OR (truong lop)))) dung cong thanh san ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh ((trung ap) or (((trung lap) OR (truong lop)))) dung cong thanh san ban*.