Perhaps you should try some spelling variations:
nhanh mang » nhanh lang, hanh mang, nhanh thang
nhung cong » dung cong, thong cong, hang cong
hien hanh » dieu hanh
vua nhung » va nhung, cua nhung, qua nhung
cong van » cong vang, cong san, song van
tuan tai » quan tai, tan tai, tuan tuoi
toan tai » toan tap, doanh tai, toan 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 hien hanh - ((nhanh mang) or (nhanh quang)) vua nhung cong van ((tuan tai) OR (toan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((nhanh mang) OR (nhanh quang)) vua nhung cong van ((tuan tai) OR (toan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((nhanh mang) or (nhanh quang)) vua nhung cong van ((tuan tai) OR (toan tai))".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((nhanh mang) or (nhanh quang)) vua nhung cong van ((tuan tai) OR (toan tai))*.