Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
hieu van » hieu va, thien van, lieu va
cam luoc » cam xuc, tom luoc, cam lo
luoc gia » quoc gia, luc gia, luong gia
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ma hoi. hieu van cam luoc gia thanh san ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu van cam luoc gia thanh san ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu van cam luoc gia thanh san ((cua triet) or (va triet))*.