Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien cac » hien cac, thien cau, thieu cac
toc sach » hoc sach, doc sach, thuoc sach
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac tac » cac toc, cac bac, cac dac
da tinh » dac tinh, dao tinh, dam tinh
tinh di » tinh doi, trinh di, tinh da

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 xa hoi. hieu thien cac tac da tinh di ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. hieu thien cac tac da tinh di ((va triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu thien cac tac da tinh di ((va triet) or (su triet))*.