Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham luc » cham soc, nhan luc, cham cuu
nang xa » nang x, lang xa, nang ma
lang ha » long ha
luu tre » luu tru, cuu tre, luy tre
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
dan di » danh di, dan da, dan de
di luu » vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((nang xa) or (lang ha)) hoi. hieu qua cham luc va dan di luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang xa) OR (lang ha)) hoi. hieu qua cham luc va dan di luu tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang xa) or (lang ha)) hoi. hieu qua cham luc va dan di luu tre*.