Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
chai thoi » chi thoi, chuoi thoi, chat thai
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cai phoi » cap phoi, cay phoi, chi phi
viec cac » vien cac, viec cua, viec lam
cac luc » cau luc, coc luc, cac nuoc
su tien » su kien, su hien, tu tieng
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
tu sac » tu sach, tu cac, tu san
ky va » ly va, ke va, my va
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky va ((cai phoi) or (chai thoi)). hieu viec cac luc va thanh vi su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky va ((cai phoi) OR (chai thoi)). hieu viec cac luc va thanh vi su tien.
• Adding a wildcard symbol may retrieve word variants: tu sac ky va ((cai phoi) or (chai thoi)). hieu viec cac luc va thanh vi su tien*.