Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
hanh trinh » canh tranh
cua nhung » va nhung
luong tai » dung tai, luong va
theo cuu » khao cuu, thao cua, theo yeu
theo chu » theo chieu, cho chu, chao chu
tai toan » bai toan, tap toan, tai tuan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo cuu) OR (theo chu)) tinh - ((hanh trinh) or (hanh chinh)) cua nhung luong tai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo cuu) OR (theo chu)) tinh - ((hanh trinh) OR (hanh chinh)) cua nhung luong tai toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo cuu) OR (theo chu)) tinh - ((hanh trinh) or (hanh chinh)) cua nhung luong tai toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo cuu) OR (theo chu)) tinh - ((hanh trinh) or (hanh chinh)) cua nhung luong tai toan ban*.