Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thu oanh » thuy oanh, thi oanh, thu canh
tru nang » tra nang, truc nano, thi nang
tri nang » thi nang, tra nang, tri bang
vien cao » vien cac, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
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 oanh ((tru nang) OR (tri nang)) xa hoi. hieu vien cao duc van hanh va cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu oanh ((tru nang) OR (tri nang)) xa hoi. hieu vien cao duc van hanh va cua tu".
• Adding a wildcard symbol may retrieve word variants: thu oanh ((tru nang) OR (tri nang)) xa hoi. hieu vien cao duc van hanh va cua tu*.