Perhaps you should try some spelling variations:
sach nham » sach nha, sach tham, sach han
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
duc gia » quoc gia
cua tre » cua te, cuu tre, cua triet
sang ma » tang ma, nang ma, sang tao
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, ve cai

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 nham ((sang ma) or (nang cao)) hoi. hieu ((ve cam) OR (va cam)) duc gia thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach nham ((sang ma) OR (nang cao)) hoi. hieu ((ve cam) OR (va cam)) duc gia thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach nham ((sang ma) or (nang cao)) hoi. hieu ((ve cam) OR (va cam)) duc gia thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach nham ((sang ma) or (nang cao)) hoi. hieu ((ve cam) OR (va cam)) duc gia thanh vi cua tre*.