Perhaps you should try some spelling variations:
su triet » su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
su viet » so viet
qua cai » qua hai, qua cac, qua ca
hang ca » hang va, nang cao, hang tai
ly hang » ly quang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ca hoi » cau hoi, cua hoi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly hang ca hoi. hieu qua cai ((xuc va) or (tuc va)) hanh vi ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly hang ca hoi. hieu qua cai ((xuc va) OR (tuc va)) hanh vi ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly hang ca hoi. hieu qua cai ((xuc va) or (tuc va)) hanh vi ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ly hang ca hoi. hieu qua cai ((xuc va) or (tuc va)) hanh vi ((su triet) OR (su viet))*.