Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trinh vatn » trinh van, trinh han, trinh san
cang thong » cang thang, cong thong, mang thong
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
cong cang » cong cong, cong lang, cong vang
thong cao » thong cac, thong cap, thong cau

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 vat) or (trinh vatn)) dung cong cang thong cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh ((trinh vat) OR (trinh vatn)) dung cong cang thong cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh ((trinh vat) or (trinh vatn)) dung cong cang thong cao*.