Perhaps you should try some spelling variations:
hieu hien » bieu hien, chieu chien, dieu khien
dieu hien » dieu khien, dieu kien, bieu hien
van khanh » van thanh, van hanh, van anh
cac truc » cau truc, cac tru, cac trung
truc van » truc va, thuc van, truc ban
khanh di » khanh bui, khanh duy, thanh doi
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
di su » doi su, ki su, da su

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) OR (dieu hien)) cac truc van khanh di su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x ho. ((hieu hien) OR (dieu hien)) cac truc van khanh di su triet".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x ho. ((hieu hien) OR (dieu hien)) cac truc van khanh di su triet*.