Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
vien cac » vien bach, vien dai, vien da
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
mai hoi » mai khoi, dai hoi, lai hoi
vi cua » vai cua, di cua
anh vi » hanh vi, anh va, anh ve
va anh » van anh, va danh, va hanh
cua tu » cua tuc, cua su, cua cu
ma hoi » xa hoi, ma hoa, me hoi
v nang » va nang, van nang, voi nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((v nang) or (vu nang)) ((ma hoi) or (mai hoi)). hieu vien cac nuoc va anh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (vu nang)) ((ma hoi) OR (mai hoi)). hieu vien cac nuoc va anh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (vu nang)) ((ma hoi) or (mai hoi)). hieu vien cac nuoc va anh vi cua tu*.