Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
luc ban » cuc ban, luc bat, luc van
duc ban » duc tan, duc van, dua ban
hanh te » hanh tu, hanh ve, hanh de
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
te cua » tue cua, le cua, de cua
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang ((x hoi) OR (x ho)). hieu ve cam ((luc ban) or (duc ban)) hanh te cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ((x hoi) OR (x ho)). hieu ve cam ((luc ban) OR (duc ban)) hanh te cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ((x hoi) OR (x ho)). hieu ve cam ((luc ban) or (duc ban)) hanh te cua te".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ((x hoi) OR (x ho)). hieu ve cam ((luc ban) or (duc ban)) hanh te cua te*.