Perhaps you should try some spelling variations:
thanh tung » thanh cong
theo phap » thi phap
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
tung lan » tung dan, thuong lan, tuong lanh
lan dung » van dung, dan dung, lan hung
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: ((theo phap) or (ho chieu)) tinh - thanh tung lan dung cong ((dan toan) OR (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo phap) OR (ho chieu)) tinh - thanh tung lan dung cong ((dan toan) OR (manh toan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo phap) or (ho chieu)) tinh - thanh tung lan dung cong ((dan toan) OR (manh toan)) cau*".