Perhaps you should try some spelling variations:
tinh vai » tinh va, tinh hai, tinh bai
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
va tinh » may tinh
sach tu » sach thu, cach tu, sach ty
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sang ma » tang ma, nang ma, sang tao
cuu tre » cau tren, cau treo
soc va » hoc va, loc va, doc va

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 tu ((mang may) or (sang ma)) hoi. hieu vu cham soc va tinh vai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((mang may) OR (sang ma)) hoi. hieu vu cham soc va tinh vai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((mang may) or (sang ma)) hoi. hieu vu cham soc va tinh vai ((cua tre) or (cuu tre))*.