Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
vien cac » vien bach, vien dai, vien da
te sach » toc sach
sai cua » dai cua, hai cua, lai cua
va danh » va dinh, va hanh, dia danh
cac xuc » cam xuc, cac nuoc, chat xuc
xay hoi » xa hoi, tay hoi, cay phoi
y dang » ky dang, 2 dang, _ dang
va dan » ca dan, va dao, va dau
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: te sach y dang xay hoi. hieu vien cac xuc ((((va danh) or (va dan))) or (van hanh)) sai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y dang xay hoi. hieu vien cac xuc ((((va danh) OR (va dan))) OR (van hanh)) sai cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach y dang xay hoi. hieu vien cac xuc ((((va danh) or (va dan))) or (van hanh)) sai cua tu*.