Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh lam » dinh van, tinh lao
danh lai » danh sai, gianh lai, hanh lam
sang mai » sang ma, sang tai, lang mai
cam duc » cam xuc, cao duc, pham duc
sach ky » sac ky, sach ty, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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) or (sach y)) sang mai hoi. hieu va cam duc va ((danh lai) OR (dinh lam)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) sang mai hoi. hieu va cam duc va ((danh lai) OR (dinh lam)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) sang mai hoi. hieu va cam duc va ((danh lai) OR (dinh lam)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) sang mai hoi. hieu va cam duc va ((danh lai) OR (dinh lam)) cua triet*.