Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
vu sach » vu bach, su sach, vu khach
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cam lo » nam lo, cam ly, cam o
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: ((vu sach) or (thu sach)) ky tang xa hoi. hieu qua ((cam loc) or (cam lo)) ban thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (thu sach)) ky tang xa hoi. hieu qua ((cam loc) OR (cam lo)) ban thanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (thu sach)) ky tang xa hoi. hieu qua ((cam loc) or (cam lo)) ban thanh dai cua te*.