Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ky danh » ky dang
cam tuc » cam xuc, cam tu, nam thuc
va tinh » may tinh
tai cua » thai cua, tri cua, dai cua
ky anh » ly anh, ty anh
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ky danh) or (ky anh)) xa hoi. lieu va cam tuc va tinh ((tai cua) or (tai cuc)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky danh) OR (ky anh)) xa hoi. lieu va cam tuc va tinh ((tai cua) OR (tai cuc)) te.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky danh) or (ky anh)) xa hoi. lieu va cam tuc va tinh ((tai cua) or (tai cuc)) te*.