Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
vanh dai » van dai, vanh tai, lanh dao
hanh dai » hanh tai, hanh dao, thanh dat
cac luc » cau luc, coc luc, cac nuoc
vu sach » vu bach, vu khach
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
su sach » so sach
luc va » duc va, tuc va, loc va
cua te » cua tu

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 cac luc va ((hanh dai) OR (vanh dai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ly hang xa hoi. hieu vien cac luc va ((hanh dai) OR (vanh dai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (su sach)) ly hang xa hoi. hieu vien cac luc va ((hanh dai) OR (vanh dai)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ly hang xa hoi. hieu vien cac luc va ((hanh dai) OR (vanh dai)) cua te*.