Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thuc van » thuc vat, thuc dan, thuc va
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
bo sach » co sach, hoc sach
tuc van » truc van, tuc va, duc van
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach y nang xa hoi. hieu ve cac ((tuc van) OR (thuc van)) ((hang di) or (hang vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y nang xa hoi. hieu ve cac ((tuc van) OR (thuc van)) ((hang di) OR (hang vi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach y nang xa hoi. hieu ve cac ((tuc van) OR (thuc van)) ((hang di) or (hang vi)) su triet*".