Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
anh quang » anh xquang, nhanh quang, tinh quang
cua nhung » va nhung
anh quan » anh tuan, ban quan, anh nhan
cong san » cong tac
bang cau » hang cau, bang cac, nang cao
ban cau » ban can, van cau, ban dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - ((anh quang) or (anh quan)) cua nhung cong san ((ban cau) OR (bang cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((anh quang) OR (anh quan)) cua nhung cong san ((ban cau) OR (bang cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((anh quang) or (anh quan)) cua nhung cong san ((ban cau) OR (bang cau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((anh quang) or (anh quan)) cua nhung cong san ((ban cau) OR (bang cau))*.