Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hien xanh » hien hanh, hien nhanh, chieu xanh
banh tran » banh trang, ban tran, canh tranh
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong san » cong tac
phan cac » nhan cach, phan dau, phan lap

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 - banh tran van nhung ((cong san) or (cong thanh)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - banh tran van nhung ((cong san) OR (cong thanh)) phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - banh tran van nhung ((cong san) or (cong thanh)) phan cac*.