Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
kinh dat » dinh dat, kinh dao, chinh dat
hoc sac » hoc sach, hoc cac, hoc mac
van cac » van hac, van cau, van bac
cac hoi » cac thoi, cac khoi, cau hoi
va kinh » va tinh, qua kinh
dat cua » dai cua, day cua, mat cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
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: hoc sac ky nang x hoi. hieu van cac hoi va kinh dat cua tre~.
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang x hoi. hieu van cac hoi va kinh dat cua tre*.