Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua

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 ((ky lang) or (ky nang)) ha hoi. hieu va cam ((tuc xa) or (duc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky nang)) ha hoi. hieu va cam ((tuc xa) OR (duc va)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) or (ky nang)) ha hoi. hieu va cam ((tuc xa) or (duc va)) hanh di cua tre*.