Perhaps you should try some spelling variations:
khanh luan » khanh thuan, doanh luan, hang luan
nhung cong » thong cong, hang cong, nhung don
hien manh » hien hanh, tien manh, hieu manh
dung cong » dung trong
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap
luan va » luan van, luat va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien manh - khanh luan va ((nhung cong) OR (dung cong)) san toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - khanh luan va ((nhung cong) OR (dung cong)) san toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - khanh luan va ((nhung cong) OR (dung cong)) san toan cao*.