Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hoc mac » hoc ma, hoc may, hoc cac
ky dang » ky danh
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

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