Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thuy canh » thuy anh, thu canh, thuy hanh
thu oanh » thuy oanh, thi oanh, thu canh
tru nang » tra nang, tri nang, truc nano
vien cao » vien cac, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
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) or (thuy canh)) tru nang xa hoi. hieu vien cao duc van hanh va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu oanh) OR (thuy canh)) tru nang xa hoi. hieu vien cao duc van hanh va cua tu.
• Adding a wildcard symbol may retrieve word variants: ((thu oanh) or (thuy canh)) tru nang xa hoi. hieu vien cao duc van hanh va cua tu*.