Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang tao » nang cao, sang tao, nang tai
va thanh » gia thanh, ban thanh, va tinh
tang tao » sang tao, tang tai, tan tao
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
lap cua » lai cua, tap cua, lam cua
cua te » cua tu

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 ((tang tao) or (nang tao)) hoi. hieu va pham duc ((va thanh) or (may tinh)) lap cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky ((tang tao) OR (nang tao)) hoi. hieu va pham duc ((va thanh) OR (may tinh)) lap cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ky ((tang tao) or (nang tao)) hoi. hieu va pham duc ((va thanh) or (may tinh)) lap cua te*.