Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
han tai » hang tai, nhan tai, van tai
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
ky tang » ky dang, kho tang, ky trong
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh
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: tu sach ((ky tang) or (ky nang)) ma hoi. hieu ((ve cham) OR (va cham)) xuc va han tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (ky nang)) ma hoi. hieu ((ve cham) OR (va cham)) xuc va han tai va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) or (ky nang)) ma hoi. hieu ((ve cham) OR (va cham)) xuc va han tai va thiet*".