Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va trien » va truyen, va thiet, va tuyen
cham luc » cham soc, nhan luc, cham cuu
qua cham » qua hai, qua cac, va cham
sang ma » tang ma, nang ma, sang tao
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc 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 ky) OR (sach ty)) sang ma hoi. hieu qua cham luc va hanh vi ((cua triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) sang ma hoi. hieu qua cham luc va hanh vi ((cua triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) sang ma hoi. hieu qua cham luc va hanh vi ((cua triet) or (va trien))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) sang ma hoi. hieu qua cham luc va hanh vi ((cua triet) or (va trien))*.