Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
tinh vai » tinh va, tinh bai, tinh lai
tinh hai » tinh thai, tinh chat, trinh han
cong van » cong vang, cong san, song van
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang 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 - canh ((tinh vai) or (tinh hai)) nhung cong van ((phan cau) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh ((tinh vai) OR (tinh hai)) nhung cong van ((phan cau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh ((tinh vai) or (tinh hai)) nhung cong van ((phan cau) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh ((tinh vai) or (tinh hai)) nhung cong van ((phan cau) OR (phan dau))*.