Perhaps you should try some spelling variations:
cach thuc » anh thuc
hieu vien » hieu hien, hieu viec, lieu vien
dang cay » dang xay, dang ca, dang cac
cay phoi » cap phoi, tay hoi, cay cho
van hanh » van thanh, ban hanh, van anh
cac thu » cac thoi
vien da » vien dai, hien dai
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
da duc » dao duc, da duoc, do duc
va cua » va chua, via cua, ca cua
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)) dang cay phoi. hieu vien da duc van hanh va cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((cach thuc) OR (cac thu)) dang cay phoi. hieu vien da duc van hanh va cua su.
• Adding a wildcard symbol may retrieve word variants: thu ((cach thuc) or (cac thu)) dang cay phoi. hieu vien da duc van hanh va cua su*.