Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van pham » san pham, van phan, van phat
dinh lam » dinh van, tinh lao
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
va pham » va phat, va phap, vi pham
va phan » van phan, va phat, va phap
va dinh » van dinh, va kinh, va tinh
lam cua » nam cua, lam chat
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: toc sach tu nang xa hoi. lieu ((((va pham) OR (va phan))) or (van pham)) duc va dinh lam cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu nang xa hoi. lieu ((((va pham) OR (va phan))) OR (van pham)) duc va dinh lam cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu nang xa hoi. lieu ((((va pham) OR (va phan))) or (van pham)) duc va dinh lam cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach tu nang xa hoi. lieu ((((va pham) OR (va phan))) or (van pham)) duc va dinh lam cua te*.