Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
phat duc » pham duc, phan duc, phan duoc
duc tuan » duc thuan, duc tan, duc toan
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
anh vi » hanh vi, anh va, anh ve
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va

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 ky nang x hoi. hieu va phat duc tuan anh vi va triet~.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu va phat duc tuan anh vi va triet*.