Perhaps you should try some spelling variations:
thanh thuc » thanh thuy, nhanh thuc, thach thuc
danh kien » dinh kien, danh viet, linh kien
va thanh » gia thanh, ban thanh, va tinh
vat danh » va danh, van danh, luat danh
kien cua » khien cua, dien cua, tien cua
sach ky » sac ky, sach kem, sach hay
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ky) or (((sach ty) OR (sach y)))) nang xa hoi. lieu va thanh thuc vat danh kien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ky) OR (((sach ty) OR (sach y)))) nang xa hoi. lieu va thanh thuc vat danh kien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ky) or (((sach ty) OR (sach y)))) nang xa hoi. lieu va thanh thuc vat danh kien cua tre".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ky) or (((sach ty) OR (sach y)))) nang xa hoi. lieu va thanh thuc vat danh kien cua tre*.