Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
ky tang » ky nang, ky dang, kho tang
va hanh » van hanh, va thanh, va danh
ky lang » ky nang, ky dang, tay lang
su sach » so sach, vu sach
ha hoi » hoa hoi, ha noi, xa hoi
va han » va phan, van han, va hang

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 ((ky lang) OR (ky tang)) ha hoi. hieu van cham xuc ((va han) or (va hanh)) tri va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky tang)) ha hoi. hieu van cham xuc ((va han) OR (va hanh)) tri va thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky tang)) ha hoi. hieu van cham xuc ((va han) or (va hanh)) tri va thieu".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky tang)) ha hoi. hieu van cham xuc ((va han) or (va hanh)) tri va thieu*.