Perhaps you should try some spelling variations:
hieu vien » hieu hien, thieu nien, hieu tieng
hieu viec » nhieu viec, hieu ve, sieu viet
bach tuoc » sach duoc, sach nuoc
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, duoc va
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
ca tren » cau tren, cu tren, la tren
y nang » ky nang, ly nang, v nang
di ca » di cau, di cua, doi ca

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 y nang xa hoi. ((hieu vien) or (hieu viec)) bach tuoc va hanh di ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. ((hieu vien) OR (hieu viec)) bach tuoc va hanh di ca tren.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((hieu vien) or (hieu viec)) bach tuoc va hanh di ca tren*.