Perhaps you should try some spelling variations:
thanh luc » thanh luu, than luc, nhan luc
hanh lai » hanh lam, hanh tai, thanh lap
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, te sach, tu cach
lai cua » dai cua, hai cua, lai chau
luc ban » duc ban, cuc ban, luc bat
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
su sach » so sach, vu sach

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 (su sach)) vu ((nang ma) or (sang ma)) hoi. hieu va thanh luc ban hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) vu ((nang ma) OR (sang ma)) hoi. hieu va thanh luc ban hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) vu ((nang ma) or (sang ma)) hoi. hieu va thanh luc ban hanh lai cua tre*.