Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung dong » nhung don, nhung dung, nhung bong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
trinh he » trinh han, trinh hoa, trinh thi
toan ban » van ban

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