Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
van hang » van khang, van hoang, van thang
sach thu » sach thieu, sach tham, cach thuc
hang di » hang doi, hang vi, hang dien
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
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 thu) or (sach thue)) nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc van hang di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach thue)) nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc van hang di su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thu) or (sach thue)) nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc van hang di su triet*".