Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh than » hanh han, hanh nhan, hanh phan
cua thong » cua thuong, cua khong, suat thong
cua tong » cua cong, cua dong, cua nong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - hanh than ((cua thong) OR (cua tong)) cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu xanh - hanh than ((cua thong) OR (cua tong)) cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh than ((cua thong) OR (cua tong)) cong tac toan cao*.