Perhaps you should try some spelling variations:
hanh dai » hanh tai, vanh dai, thanh dat
hanh dao » lanh dao, thanh dat, thanh dam
dang xay » dang van, van xay
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cac hoc » cach hoc, cac hop, bac hoc
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
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 san ky ((nang xa) or (dang xay)) hoi. hieu va cac hoc va ((hanh dai) or (hanh dao)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky ((nang xa) OR (dang xay)) hoi. hieu va cac hoc va ((hanh dai) OR (hanh dao)) cua tu.
• Adding a wildcard symbol may retrieve word variants: te san ky ((nang xa) or (dang xay)) hoi. hieu va cac hoc va ((hanh dai) or (hanh dao)) cua tu*.