Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
nhung cong » thong cong, hang cong, nhung don
quang toan » quang tuan, quang tran, quang doan
dung cong » dung trong
vang toan » van toan, dang toan, vang trang

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 manh - nhanh tinh chat ((nhung cong) or (dung cong)) ((vang toan) OR (quang toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu manh - nhanh tinh chat ((nhung cong) OR (dung cong)) ((vang toan) OR (quang toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu manh - nhanh tinh chat ((nhung cong) or (dung cong)) ((vang toan) OR (quang toan)) cau".
• Adding a wildcard symbol may retrieve word variants: toc thieu manh - nhanh tinh chat ((nhung cong) or (dung cong)) ((vang toan) OR (quang toan)) cau*.