Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
dai khoang » da khoang, dai khong, tao khoang
hoc thieu » toc thieu, hoc hien
dai khung » dai khong, dam khung, mai hung
manh toan » thanh toan, anh tuan, tinh toan
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 manh - thanh cong ((dai khung) OR (dai khoang)) huong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - thanh cong ((dai khung) OR (dai khoang)) huong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu manh - thanh cong ((dai khung) OR (dai khoang)) huong ((dan toan) or (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - thanh cong ((dai khung) OR (dai khoang)) huong ((dan toan) or (manh toan)) cao*.