Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
ve chat » va chat, van chat
va cham » va chat, va tham
xuc van » duc van, luc van, vuc van
van han » van hanh, van phan, van nhan
han mai » han tai, ban mai, han mac
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 sach ky ((nang xa) or (lang xa)) hoi. hieu ((ve chat) or (va cham)) xuc van han mai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve chat) OR (va cham)) xuc van han mai va thiet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang xa) or (lang xa)) hoi. hieu ((ve chat) or (va cham)) xuc van han mai va thiet*.