Perhaps you should try some spelling variations:
cac trung » cac truong, dac trung, bac trung
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
trung va » truong va, trang va, trung ha
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, va danh
qua cac » cua cac
nang ma » tang ma, sang ma, nang cao
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (vu khach)) y nang ma hoi. hieu qua cac trung va hanh vi ((cua triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu khach)) y nang ma hoi. hieu qua cac trung va hanh vi ((cua triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu khach)) y nang ma hoi. hieu qua cac trung va hanh vi ((cua triet) or (su tien))*.