Perhaps you should try some spelling variations:
nang dau » hang dau, xang dau, nang du
dau hoi » cau hoi, dai hoi, dan hoi
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
han tai » hang tai, nhan tai, van tai
tai cua » thai cua, tai cuc, tri cua
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
va han » va phan, van han, va hanh
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((cac ky) or (sach y)) nang dau hoi. hieu ve cau luc va han tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((cac ky) OR (sach y)) nang dau hoi. hieu ve cau luc va han tai cua te.
• Adding a wildcard symbol may retrieve word variants: su ((cac ky) or (sach y)) nang dau hoi. hieu ve cau luc va han tai cua te*.