Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
te sach » toc sach
va hanh » van hanh, va thanh, va danh
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
ly hang » ly quang
ca viet » va viet, co viet, hoa viet
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
ca hoi » cau hoi, cua hoi, co hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ly hang ((ca hoi) or (xa hoi)). hieu va cam xuc va hanh vi ((su triet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly hang ((ca hoi) OR (xa hoi)). hieu va cam xuc va hanh vi ((su triet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: te sach ly hang ((ca hoi) or (xa hoi)). hieu va cam xuc va hanh vi ((su triet) or (ca viet))*.