Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
van phan » van phong, van thanh, luan phan
nang xa » lang xa, nang ma, mang xa
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
van han » van hanh, van nhan, van hoan
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
tai va » thai va, mai va, tri va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky ((nang xa) or (nang x)) hoi. hieu vu cham xuc ((van han) OR (van phan)) tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky ((nang xa) OR (nang x)) hoi. hieu vu cham xuc ((van han) OR (van phan)) tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky ((nang xa) or (nang x)) hoi. hieu vu cham xuc ((van han) OR (van phan)) tai va thiet".
• Adding a wildcard symbol may retrieve word variants: vu sac ky ((nang xa) or (nang x)) hoi. hieu vu cham xuc ((van han) OR (van phan)) tai va thiet*.