Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
khanh duy » manh duy, hanh dua, khanh bui
hien cac » thien cac, vien cac, hieu cac
cac truc » cau truc, cac tru, cac trung
truc van » truc va, thuc van, truc ban
khanh di » khanh bui, thanh doi, hanh de
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van 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 v nang x ho. hieu hien cac truc van ((khanh di) OR (khanh duy)) su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x ho. hieu hien cac truc van ((khanh di) OR (khanh duy)) su triet".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x ho. hieu hien cac truc van ((khanh di) OR (khanh duy)) su triet*.