Perhaps you should try some spelling variations:
hieu vien » hieu hien, thieu nien, hieu tieng
hieu viec » nhieu viec, hieu ve, sieu viet
danh dai » danh dau, danh di, danh sai
vu sach » vu bach, vu khach
cac luc » cau luc, coc luc, cac nuoc
su sach » so sach
ly hang » ly quang
hang xa » hoang xa, hang va, hang ca
va danh » va dinh, va dan, va hanh
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) ly hang xa hoi. ((hieu vien) or (hieu viec)) cac luc va danh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ly hang xa hoi. ((hieu vien) OR (hieu viec)) cac luc va danh dai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ly hang xa hoi. ((hieu vien) or (hieu viec)) cac luc va danh dai cua tu*.