Perhaps you should try some spelling variations:
cham sac » cham soc, pham sach, cap sac
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
tu sach » su sach, te sach, tu cach
cua tre » cua te, cua triet, dua tren
sac van » cac van, san van, sat van
su cham » su pham, tu cham, vu cham
tieu su » thieu so
xang xa » lang xa, mang xa, ang xa
cuu tre » cau tren, cau treo

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 (thu sach)) ty xang xa hoi. tieu su cham sac van hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty xang xa hoi. tieu su cham sac van hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty xang xa hoi. tieu su cham sac van hanh vi ((cua tre) or (cuu tre))*.