Perhaps you should try some spelling variations:
quy kinh » quy dinh, quy ninh, quyet kinh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
cua tre » cuu tre, cua triet, dua tren
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
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: te sach ty nang xa hoi. hieu ve cac duc ((quy kinh) OR (qua kinh)) viet ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu ve cac duc ((quy kinh) OR (qua kinh)) viet ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ve cac duc ((quy kinh) OR (qua kinh)) viet ((cua tre) or (cua te))*".