Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
toan hanh » toan thanh, toan anh, tran hanh
su triet » su viet, su tien, ve triet
ton hanh » hon hanh, lon hanh, trong hanh
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
sach ky » sac ky, sach y, sach ty
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
te sach » toc sach
ha hoi » hoa hoi, ha noi, xa hoi

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 ky dang ha hoi. hieu ve pham duc ((ton hanh) OR (toan hanh)) va ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ha hoi. hieu ve pham duc ((ton hanh) OR (toan hanh)) va ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ha hoi. hieu ve pham duc ((ton hanh) OR (toan hanh)) va ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ha hoi. hieu ve pham duc ((ton hanh) OR (toan hanh)) va ((cua triet) or (su triet))*.