Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach thu, xach tay
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
tuc va » thuc va, truc va, tuc xa
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: so ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) or (hieu qua)) cam tuc va hang di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) OR (hieu qua)) cam tuc va hang di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) or (hieu qua)) cam tuc va hang di su triet".
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) or (hieu qua)) cam tuc va hang di su triet*.