Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
nhanh mang » nhanh lang, hanh mang, nhanh quang
hien hanh » dieu hanh
cua khong » hua khong, cua phuong, cua thuong
mang toan » manh toan, dang toan, mang thang
mang cua » manh cua, dung cua, ban cua
dan toan » van toan, dan than, manh 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 hien hanh - nhanh mang cua khong thong ((mang toan) or (dan toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - nhanh mang cua khong thong ((mang toan) OR (dan toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - nhanh mang cua khong thong ((mang toan) or (dan toan)) cau*.