Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh viet » ninh viet, danh viet, trinh viet
toc sach » hoc sach, doc sach, thuoc sach
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
va dinh » van dinh, va kinh, va tinh
ve cac » va cac, vien cac
dac va » duc va, day va, dat va
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoi. hieu ve cac dac va dinh viet ((((cua te) or (cuu tre))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu ve cac dac va dinh viet ((((cua te) OR (cuu tre))) OR (cua triet))*.