Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
trinh viet » ninh viet, trinh vat
nhung cong » dung cong, thong cong, hang cong
sang thuat » sang than, sang thuoc
thien anh » thien danh, tien anh, thien thanh
cong sang » cong san, cong lang, cong vang
thuat cao » thuat co, thuat bao, thuat cam
trinh vi » trinh va, trinh ve, trinh van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (thien anh)) - canh ((trinh vi) or (trinh viet)) nhung cong sang thuat cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - canh ((trinh vi) OR (trinh viet)) nhung cong sang thuat cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - canh ((trinh vi) or (trinh viet)) nhung cong sang thuat cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - canh ((trinh vi) or (trinh viet)) nhung cong sang thuat cao*.