Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
nang dua » nang suat, nang quan, nang luc
cong dan » cong san, cong tan, huong dan
nang du » nang tu, nang luc, nang doc
dan su » dang su
su cao » cu cao, vu cao, su co

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) or (chieu sang)) - ganh ((nang dua) OR (nang du)) thuong cong dan su cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - ganh ((nang dua) OR (nang du)) thuong cong dan su cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sang)) - ganh ((nang dua) OR (nang du)) thuong cong dan su cao*".