Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hien xanh » hien hanh, hien nhanh, chieu xanh
canh tinh » hanh tinh, manh tinh, canh tranh
cuong tap » luong tap, cong tac, luong tai
cong tap » cong tac, cong tan, tong tap
doan cao » doanh cao, toan cao, doan cap
tinh va » tich va, trinh van, trinh vat

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