Perhaps you should try some spelling variations:
cach thuc » anh thuc
hieu vien » hieu hien, hieu viec, lieu vien
van tuan » van quan, van ban, anh tuan
cac thu » cac thoi
lang xa » lang ha, dang xay, lang van
vien da » vien dai, hien dai
duc van » duc va, duc tan, duc manh
tuan va » toan va, luan va, quan va
da duc » dao duc, da duoc, do duc
va cua » va chua, via cua, ca cua
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: thu ((cach thuc) or (cac thu)) lang xa hoi. hieu vien da duc van tuan va cua tu~.
• 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 van tuan va cua tu.
• Adding a wildcard symbol may retrieve word variants: thu ((cach thuc) or (cac thu)) lang xa hoi. hieu vien da duc van tuan va cua tu*.