Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lam » thanh lap, hanh kem, hanh va
tay tang » tay lang, tay trung, tay quang
cham duc » pham duc, cham soc, pham duy
su cham » su pham, tu cham, vu cham
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
ty tang » ty xang, ty hang, ky tang
hieu su » hieu sau, tieu su, hieu so
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty tang) or (tay tang)) ma hoi. hieu su cham duc va hanh lam ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty tang) OR (tay tang)) ma hoi. hieu su cham duc va hanh lam ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty tang) or (tay tang)) ma hoi. hieu su cham duc va hanh lam ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: so sach ((ty tang) or (tay tang)) ma hoi. hieu su cham duc va hanh lam ((cua tre) OR (cua triet))*.