Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
van hanh » van thanh, ban hanh, van anh
va thieu » va thiet, va hieu, va tieu
te sach » toc sach
ky lang » ky dang, ky tang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
va han » va phan, van han, va hanh

You may be able to get more results by adjusting your search query.

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