Perhaps you should try some spelling variations:
thien van » thi van
va triet » va thiet, va trien, ve triet
hieu van » hieu va, lieu va, hieu ve
ty hang » ly hang, ty xang, thi hang
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ly nang
cam duc » cam xuc, cao duc, pham duc
va lanh » va lang, va danh, va hanh
su sach » so sach, vu sach
dao va » dao van, tao va, do 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 ((ty nang) or (ty hang)) mai hoi. ((hieu van) or (thien van)) cam duc va lanh dao va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty hang)) mai hoi. ((hieu van) OR (thien van)) cam duc va lanh dao va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty hang)) mai hoi. ((hieu van) or (thien van)) cam duc va lanh dao va triet*.