Perhaps you should try some spelling variations:
sang tao » hang tai
hanh day » hanh may, han day, hanh dao
cham duc » pham duc, cham soc, pham duy
day cua » dai cua
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, tu cach
sang ma » tang ma, nang ma, mang may
te sach » toc sach
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: ((tu sach) OR (te sach)) duy ((sang ma) or (sang tao)) hoi. hieu va cham duc va hanh day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) duy ((sang ma) OR (sang tao)) hoi. hieu va cham duc va hanh day cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) duy ((sang ma) or (sang tao)) hoi. hieu va cham duc va hanh day cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) duy ((sang ma) or (sang tao)) hoi. hieu va cham duc va hanh day cua tre*.