Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
su sach » so sach, vu sach
nang xa » nang ma, mang xa, ang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc van » duc van, luc van, vuc van
van han » van hanh, van phan, van nhan
han tai » hang tai, nhan tai, van tai
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: su sach y ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu va cham xuc van han tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((((nang xa) OR (lang xa))) OR (nang x)) hoi. hieu va cham xuc van han tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu va cham xuc van han tai va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu va cham xuc van han tai va thiet*.