Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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 y nang ma hoi. hieu qua cac duc ((van thanh) or ((tuan or luan) anh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu qua cac duc ((van thanh) OR ((tuan OR luan) anh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu qua cac duc ((van thanh) or ((tuan or luan) anh)) vi cua triet*.