Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hieu san » hieu van, hieu sau, chieu sang
va triet » va thiet, va trien, ve triet
ty nang » ky nang, ty xang, ty hang
duc van » duc va, duc tan, duc manh
minh vi » minh voi, dinh vi, minh va
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va
pham » phan

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) or (hoc sach)) ty nang x hoi. hieu san pham duc van minh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ty nang x hoi. hieu san pham duc van minh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ty nang x hoi. hieu san pham duc van minh vi va triet*.