Perhaps you should try some spelling variations:
chet duoc » che duoc, cho duoc, che quoc
ban thanh » ban hanh, ban hang
thu sach » thuat sach, thuoc sach, thu hoach
duoc ban » duc ban, quoc ban, buoc ban
thanh ve » hanh ve, thanh va, thanh vien
tu sach » su sach, te sach, tu cach
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
va chet » va chiet, va che, va chat
ve cua » le cua, de cua, te 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: ((tu sach) or (thu sach)) ly nang x ho. hieu va chet duoc ban thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly nang x ho. hieu va chet duoc ban thanh ve cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ly nang x ho. hieu va chet duoc ban thanh ve cua te*.