Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va tinh » may tinh
tinh ve » trinh ve, tinh ven, dinh ve
v pham » d pham
ve cua » le cua, de cua, te cua
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: ((su sach) or (toc sach)) ky nang xa hoi. hieu ((v pham) or (vi pham)) day va tinh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) ky nang xa hoi. hieu ((v pham) OR (vi pham)) day va tinh ve cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (toc sach)) ky nang xa hoi. hieu ((v pham) or (vi pham)) day va tinh ve cua te*.