Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
mang xa » lang xa, mang may, dang xay
sac ky » cac ky, sai ky
va han » va phan, van han, va hang
su sac » su sach, su cac, su xac
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: su sac ky ((mang xa) or (nang x)) hoi. hieu va cham xuc ((va han) or (va hanh)) tri va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((mang xa) OR (nang x)) hoi. hieu va cham xuc ((va han) OR (va hanh)) tri va thiet.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((mang xa) or (nang x)) hoi. hieu va cham xuc ((va han) or (va hanh)) tri va thiet*.