Perhaps you should try some spelling variations:
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
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) or (co sach)) ky nang x hoi. hieu ve cam tuc va hang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ky nang x hoi. hieu ve cam tuc va hang di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) ky nang x hoi. hieu ve cam tuc va hang di cua tre*.