Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
ve chim » va chim, ve chinh, te chiem
han tri » han tai, van tri, thanh tri
ve cham » ve chat, vu cham, viet cham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
luc va » duc va, tuc va, loc va
va han » va phan, van han, va hanh
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 ty nang xa hoi. hieu ((((ve cham) or (ve chim))) or (va cham)) luc va han tri va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((((ve cham) OR (ve chim))) OR (va cham)) luc va han tri va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((((ve cham) or (ve chim))) or (va cham)) luc va han tri va thiet*.