Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
dang xay » dang van, van xay
su triet » su tien, ve triet
bien cac » vien cac, dien cac, bien ca
tu sach » thu sach, su sach, te sach
su viet » so viet
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
luc va » duc va, tuc va, loc va
xuc va » duc va, tuc va, xac va

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 ky dang xay hoi. thieu bien cac ((xuc va) or (luc va)) hanh vi ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xay hoi. thieu bien cac ((xuc va) OR (luc va)) hanh vi ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. thieu bien cac ((xuc va) or (luc va)) hanh vi ((su triet) or (su viet))*.