Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
cong cang » cong lang, cong vang, cong bang
cong cong » cong dong, trong cong, dung cong
thang cao » thong cao, thang lao, nang cao
trinh va » trinh van, trinh vat, trinh vi
trinh ve » trinh he, trinh vi, trinh viet

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