Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
cang thang » cong thanh, dang thanh
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
sang than » dang thanh, sang tao, ban than
trinh va » trinh van, trinh ve, trinh vi

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