Perhaps you should try some spelling variations:
hien khanh » hien hanh, dien khanh, thien thanh
hien nhanh » hien hanh, thien thanh, tien thanh
canh trinh » canh tranh, hanh trinh, canh tinh
hien xanh » hien hanh, chieu xanh, khien canh
tong cong » trong cong, cong cong, dung cong
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
san quan » van quan, ban quan, dan quan
quan cau » quang cao, toan cau, quan ha
va tong » va thong, va tuong, va trong

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