Perhaps you should try some spelling variations:
cua tre » cua te, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
cuu tre » cau tren, cau treo
hieu va » lieu va, hieu qua
cam tu » cam thu, nam tu, dam tu
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) or (sac ky)) nang x hoi. hieu va cam tu va hanh di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sac ky)) nang x hoi. hieu va cam tu va hanh di ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sac ky)) nang x hoi. hieu va cam tu va hanh di ((cua tre) or (cuu tre))*.