Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dinh vai » dinh van, dinh vi, dinh va
tang tao » sang tao, tang tai, nang tao
tao khoi » tao hoi, thao khoa, lao khoa
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
va pham » van pham, va phap, va phan
ky tang » ky nang, ky dang, kho tang
huu va » cuu va, tuu va
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: ((su sach) or (thu sach)) ky tang tao khoi. hieu ((va pham) or (va phat)) huu va dinh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky tang tao khoi. hieu ((va pham) OR (va phat)) huu va dinh vai cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky tang tao khoi. hieu ((va pham) or (va phat)) huu va dinh vai cua te*.