Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
ve thong » he thong, va thong, ve chong
ve phong » va phong, van phong, mo phong
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat tu » phan tu, pham tu, phap tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - canh trinh ((ve thong) OR (ve phong)) cong tac phat tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - canh trinh ((ve thong) OR (ve phong)) cong tac phat tu".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh trinh ((ve thong) OR (ve phong)) cong tac phat tu*.