Perhaps you should try some spelling variations:
su triet » su viet, su tien
ve triet » va trien
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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

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