Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
canh manh » lanh manh, canh tranh, cach mang
dang cong » dung cong
danh toan » manh toan, anh toan, dang toan
dan toan » van toan, dan than, manh toan
manh va » hanh va, anh va, minh va
va dang » van dang, va nang, va lang

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) or (theo tieu)) xanh - canh manh va dang cong ((danh toan) OR (dan toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo tieu)) xanh - canh manh va dang cong ((danh toan) OR (dan toan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (theo tieu)) xanh - canh manh va dang cong ((danh toan) OR (dan toan)) cau*".