Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
nhung cong » dung cong, thong cong, nhung don
hanh tinh » hanh trinh, thanh tinh, canh tinh
hang cong » dang cong, hang nong, bang cong
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
theo ho » theo hop, theo bo, tho ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ho manh - ((hanh tinh) or (nhanh tinh)) cua ((nhung cong) or (hang cong)) tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ho manh - ((hanh tinh) OR (nhanh tinh)) cua ((nhung cong) OR (hang cong)) tac toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ho manh - ((hanh tinh) or (nhanh tinh)) cua ((nhung cong) or (hang cong)) tac toan ban*.