Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
van hanh » ban hanh, van anh, van ban
va triet » va thiet, va trien, ve triet
tu tieng » luc tieng, tu tuong, tu trong
sach ky » sac ky, sach y, sach ty
va nhan » van nhan, ca nhan, va phan
duc van » duc va, duc tan, duc manh
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang x hoi. hieu ((va nhan) or (van thanh)) duc van hanh vi ((va triet) or (tu tieng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu ((va nhan) OR (van thanh)) duc van hanh vi ((va triet) OR (tu tieng)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu ((va nhan) or (van thanh)) duc van hanh vi ((va triet) or (tu tieng))*.