Perhaps you should try some spelling variations:
dan khanh » dang khanh, van khanh, dat khanh
sach tren » sach tien, sach tranh
tren nang » trien nang, tren mang, truyen nang
dua tren » dung tren
thi hanh » thi thanh
hanh cam » hanh cham, hanh lam, hanh nam
khanh vi » hanh vi, khanh v, nhanh vi
cua tre » cuu tre, cua triet, cua thep
te sach » toc sach
cam cac » ca cac, nam cac, cam chan
nang xa » nang x, lang xa, nang ma
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 tren nang xa hoi. thi hanh cam cac dan khanh vi ((((cua tre) or (dua tren))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tren nang xa hoi. thi hanh cam cac dan khanh vi ((((cua tre) OR (dua tren))) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach tren nang xa hoi. thi hanh cam cac dan khanh vi ((((cua tre) or (dua tren))) or (cua te))*.