Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh vai » thanh hai, thanh tai, thanh oai
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
cau tuc » cau truc, cau tu, cau luc
tuc gia » tac gia, duc gia, toc gia
ca viet » va viet, co viet, hoa viet
mang da » mang dat, mang dau, mang xa
ky mang » ky nang, ke mang, ky dang
va cau » van cau, va cac, va dau

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 (thu sach)) ky mang da khoa. lieu va cau tuc gia ((thanh vai) OR (thanh van)) ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky mang da khoa. lieu va cau tuc gia ((thanh vai) OR (thanh van)) ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky mang da khoa. lieu va cau tuc gia ((thanh vai) OR (thanh van)) ca viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky mang da khoa. lieu va cau tuc gia ((thanh vai) OR (thanh van)) ca viet*.