Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
sang dai » sang tai, lang dai, sang mai
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
sach ky » sach y, sach ty, sach kem
dai hoi » dai hoc, dai hai, dai moi
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky

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 (sac ky)) sang dai hoi. hieu ve cam duc va hanh lai ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) sang dai hoi. hieu ve cam duc va hanh lai ((cua triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) sang dai hoi. hieu ve cam duc va hanh lai ((cua triet) or (cuu tre))*.