Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
hoc sach » hoc sinh, hoc cac, hoc anh
van chat » cao chat
danh dai » danh dau, danh di, danh sai
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky lang xa hoi. hieu van chat ((xuc va) OR (luc va)) danh dai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky lang xa hoi. hieu van chat ((xuc va) OR (luc va)) danh dai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky lang xa hoi. hieu van chat ((xuc va) OR (luc va)) danh dai ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky lang xa hoi. hieu van chat ((xuc va) OR (luc va)) danh dai ((cua triet) or (su triet))*.