Perhaps you should try some spelling variations:
cau triet » cau trieu, cua triet, va triet
thien van » thi van
su triet » su viet, su tien, ve triet
hanh lai » hanh lam, hanh tai, thanh lap
hoc duc » hoc duoc, hoc nuoc, hoc thuc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
nang xa » lang xa, nang ma, mang xa
van hoc » van hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu ((nang xa) or (nang x)) hoi. thien van hoc duc va hanh lai ((cau triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((nang xa) OR (nang x)) hoi. thien van hoc duc va hanh lai ((cau triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu ((nang xa) or (nang x)) hoi. thien van hoc duc va hanh lai ((cau triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((nang xa) or (nang x)) hoi. thien van hoc duc va hanh lai ((cau triet) OR (su triet))*.