Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va truyen » hoa truyen, co truyen, di truyen
va trien » va thiet, va tuyen, va tieng
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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 nang ma hoi. hieu qua cam tuc va hanh vi ((cua triet) or (((va trien) OR (va truyen))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. hieu qua cam tuc va hanh vi ((cua triet) OR (((va trien) OR (va truyen)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoi. hieu qua cam tuc va hanh vi ((cua triet) or (((va trien) OR (va truyen))))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. hieu qua cam tuc va hanh vi ((cua triet) or (((va trien) OR (va truyen))))*.