Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
va triet » va thiet, va trien, ve triet
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
thu gia » thue gia, phu gia, thue giao
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) or (van cau)) thu gia thanh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu ((van cam) OR (van cau)) thu gia thanh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu ((van cam) or (van cau)) thu gia thanh vi ((va triet) or (cua viet))*.