Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
luong quan » duong qua
dung quang » dang quang, dung quan, luong quang
nhanh cau » nhanh cay, thanh chau, nhanh ha
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
va hung » va nhung, van hung, va huong

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: ho chieu xanh - canh trinh va hung ((((luong quan) OR (thong quan))) OR (dung quang)) nhanh cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - canh trinh va hung ((((luong quan) OR (thong quan))) or (dung quang)) nhanh cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - canh trinh va hung ((((luong quan) OR (thong quan))) or (dung quang)) nhanh cau*.