Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
vien dai » hien dai
cay phoi » cap phoi, tay hoi, cay cho
xuc van » duc van, luc van, vuc van
dai xuc » dai xu, dai luoc, dai thuc
may va » may vi, day va
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua
tu san » thu san, tu ban, tu can
ke va » te va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((ke va) or (may va)) cay phoi. hieu vien dai xuc van hanh ((di cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ke va) OR (may va)) cay phoi. hieu vien dai xuc van hanh ((di cua) OR (de cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu san ((ke va) or (may va)) cay phoi. hieu vien dai xuc van hanh ((di cua) or (de cua)) tre*.