Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
hai chu » hai chau, hoi chu, hai chi
hai cuu » hai cua, hai cuc, thai cua
va tinh » may tinh
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky tang ma hoi. hieu ((ve cham) or (vu cham)) xuc va tinh ((hai cuu) OR (hai chu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang ma hoi. hieu ((ve cham) OR (vu cham)) xuc va tinh ((hai cuu) OR (hai chu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang ma hoi. hieu ((ve cham) or (vu cham)) xuc va tinh ((hai cuu) OR (hai chu)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang ma hoi. hieu ((ve cham) or (vu cham)) xuc va tinh ((hai cuu) OR (hai chu)) tre*.