Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
hieu van » hieu va, thien van, lieu va
nganh ky » nganh y, nganh xay, hanh ky
va nang » van nang, cam nang, kha nang
hai cuu » hai cua, hai chu, hai cuc
da nang » cam nang, kha nang, cao nang
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
van hoi » van hoc, van hoe, van loi
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nganh ky lang ((van hoi) or (van hoa)). hieu van cac duc ((va nang) or (da nang)) hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh ky lang ((van hoi) OR (van hoa)). hieu van cac duc ((va nang) OR (da nang)) hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: hoc nganh ky lang ((van hoi) or (van hoa)). hieu van cac duc ((va nang) or (da nang)) hai cuu tre*.