Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
dinh cuu » dinh chi
tinh cua » trinh cua, sinh cua, tinh chat
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than tap » toan tap, han tap, phan tap

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 - hoang ((dinh cuu) or (tinh cua)) nhung cong van than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hoang ((dinh cuu) OR (tinh cua)) nhung cong van than tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hoang ((dinh cuu) or (tinh cua)) nhung cong van than tap*.