Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
lang ha » long ha
hieu ve » hieu va, hieu van
cac hoc » cach hoc, cac hop, bac hoc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((nang xa) or (lang ha)) hoi. hieu ve cac hoc va hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (lang ha)) hoi. hieu ve cac hoc va hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (lang ha)) hoi. hieu ve cac hoc va hanh di cuu tre*.