Perhaps you should try some spelling variations:
hanh duoc » hanh thuoc, nganh duoc, doanh duoc
moi nguoi » con nguoi, toc nguoi, hoa nguoi
si nguoi » gi nguoi, vi nguoi, doi nguoi
tu hach » tu hanh, tu cach, tu sach
hoc tay » hoc tap, hoc may, hoc tai
toc tay » toc thai
vu hanh » vu khanh, vu thanh, du hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu hach ((hoc tay) or (toc tay)) nguoi ) or ( vu hanh duoc ((si nguoi) or (moi nguoi)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hach ((hoc tay) OR (toc tay)) nguoi ) OR ( vu hanh duoc ((si nguoi) OR (moi nguoi)) )).
• Adding a wildcard symbol may retrieve word variants: (( tu hach ((hoc tay) or (toc tay)) nguoi ) or ( vu hanh duoc ((si nguoi) or (moi nguoi)) ))*.