Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
theo dieu » theo tieu, theo chieu, thuoc dieu
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
bai toan » bai tap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo dieu hanh - ((hanh tang) or (hanh mang)) cua ((nhung cong) OR (thong cong)) bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo dieu hanh - ((hanh tang) OR (hanh mang)) cua ((nhung cong) OR (thong cong)) bai toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo dieu hanh - ((hanh tang) or (hanh mang)) cua ((nhung cong) OR (thong cong)) bai toan cao".
• Adding a wildcard symbol may retrieve word variants: theo dieu hanh - ((hanh tang) or (hanh mang)) cua ((nhung cong) OR (thong cong)) bai toan cao*.