Perhaps you should try some spelling variations:
sach kho » bach khoa, sach dao, sach nha
kho tang » cao tang
so sach » so sanh, bo sach, co sach
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
han tai » hang tai, nhan tai, van tai
tai cua » thai cua, tai cuc, tri cua
va han » va phan, van han, va hanh
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: so sach kho tang xa hoi. ((hieu ve) or (lieu va)) ((cam duc) OR (pham duc)) va han tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach kho tang xa hoi. ((hieu ve) OR (lieu va)) ((cam duc) OR (pham duc)) va han tai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach kho tang xa hoi. ((hieu ve) or (lieu va)) ((cam duc) OR (pham duc)) va han tai cua te*".