Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thanh le » thinh le, thanh ve, thanh de
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
luc van » luoc van, luu van, duc van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, dua tren
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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 ky nang xa hoi. hieu ((ve cam) OR (ve cac)) luc van thanh le ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) luc van thanh le ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) luc van thanh le ((cua tre) or (cua triet))*".