Perhaps you should try some spelling variations:
cach thuc » anh thuc
hieu vien » hieu hien, hieu viec, lieu vien
dang hanh » dang thanh, ban hanh, dang van
duc dang » duc dung, duc dong, duc bang
hanh via » hanh vi, hanh va, anh va
cac thu » cac thoi
lang xa » lang ha, dang xay, lang van
vien da » vien dai, hien dai
via cua » gia cua, gian cua, giau cua
da duc » dao duc, da duoc, do duc
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((cach thuc) or (cac thu)) lang xa hoi. hieu vien da duc dang hanh via cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((cach thuc) OR (cac thu)) lang xa hoi. hieu vien da duc dang hanh via cua su.
• Adding a wildcard symbol may retrieve word variants: thu ((cach thuc) or (cac thu)) lang xa hoi. hieu vien da duc dang hanh via cua su*.