Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
nang qua » nang quan, nang cua, nang quy
nang dua » nang du, nang suat, nang quan
dan toan » van toan, dan than, xuan toan

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 - anh ((nang qua) OR (nang dua)) dung cong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - anh ((nang qua) OR (nang dua)) dung cong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - anh ((nang qua) OR (nang dua)) dung cong ((dan toan) or (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - anh ((nang qua) OR (nang dua)) dung cong ((dan toan) or (manh toan)) cao*.