Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cuu tre, dua tren
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam
va nay » va ngay, va cay

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

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