Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
thi hanh » thi thanh
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
sach so » mach so, sach lo, sach song
so dang » su dang, so dan, so dung
xay hoi » xa hoi, tay hoi, cay phoi
thi lan » thi nang, thi lien
nam duc » nam duoc, pham duc, nam thuc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach so dang xay hoi. ((thi hanh) or (thi lan)) nam duc van hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach so dang xay hoi. ((thi hanh) OR (thi lan)) nam duc van hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach so dang xay hoi. ((thi hanh) or (thi lan)) nam duc van hanh dai cua tre*.