Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hoc thieu » toc thieu, hoc hien
canh tran » canh tranh, hanh trang, banh trang
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
tran van » luan van
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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 - canh tran van ((hang cong) OR (dang cong)) tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu manh - canh tran van ((hang cong) OR (dang cong)) tac toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - canh tran van ((hang cong) OR (dang cong)) tac toan ban*.