Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
sang mai » sang ma, sang tai, lang mai
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
sach ky » sach y, sach ty, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
cuu 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 mai hoi. hieu ve cam duc va hanh lai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) sang mai hoi. hieu ve cam duc va hanh lai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) sang mai hoi. hieu ve cam duc va hanh lai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) sang mai hoi. hieu ve cam duc va hanh lai ((cua tre) OR (cuu tre))*.