Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
van tham » van thanh, van tuan, van chat
van cham » van chat, va cham, van pham
te sach » toc sach
han tai » hang tai, nhan tai, van tai
tu sach » thu sach, su sach, tu cach
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh
tai va » thai va, mai va, tri va
x hoi » xa hoi, o hoi, x ho

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

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