Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh vat » trinh van, trinh luat, sinh vat
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
tinh va » tich va, trinh van, tinh gia

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 - hanh ((tinh va) OR (trinh vat)) nhung cong dan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tinh va) OR (trinh vat)) nhung cong dan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((tinh va) OR (trinh vat)) nhung cong dan ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tinh va) OR (trinh vat)) nhung cong dan ((toan cau) or (toan ban))*.