Perhaps you should try some spelling variations:
cach thuc » anh thuc
hieu vien » hieu hien, hieu viec, lieu vien
van hanh » van thanh, ban hanh, van anh
duoc van » duoc va, duc van, duoc ban
vien tao » vien cao, vien tai, dien tao
hanh va » hang va, hanh vi
cua tuc » cua duc, cua tu, cua thuoc
cac thu » cac thoi
ha hoi » hoa hoi, xa hoi, va hoi
va cua » va chua, via cua, ca cua

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 ((ha hoi) or (ha noi)). hieu vien tao duoc van hanh va cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((cach thuc) OR (cac thu)) lang ((ha hoi) OR (ha noi)). hieu vien tao duoc van hanh va cua tuc.
• Adding a wildcard symbol may retrieve word variants: thu ((cach thuc) or (cac thu)) lang ((ha hoi) or (ha noi)). hieu vien tao duoc van hanh va cua tuc*.