Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
cac truc » cau truc, cac tru, cac trung
va khanh » van khanh, va thanh, vu khanh
khanh di » khanh bui, khanh duy, thanh doi
su triet » su viet, su tien
ve triet » va trien
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x ho. hieu hien cac truc va khanh di ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x ho. hieu hien cac truc va khanh di ((su triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang x ho. hieu hien cac truc va khanh di ((su triet) or (ve triet))*.