Perhaps you should try some spelling variations:
manh duoc » hanh duoc, nganh duoc, doanh duoc
loi nguoi » loai nguoi, moi nguoi, doi nguoi
li nguoi » le nguoi, ly nguoi, gi nguoi
tu mach » tu cach, tu hach, tu sach
hoc tay » hoc tap, hoc may, hoc tai
toc tay » toc thai
tu manh » tu minh, tu hanh, vu manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu mach ((hoc tay) or (toc tay)) nguoi ) or ( tu manh duoc ((li nguoi) OR (loi nguoi)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu mach ((hoc tay) OR (toc tay)) nguoi ) OR ( tu manh duoc ((li nguoi) OR (loi nguoi)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu mach ((hoc tay) or (toc tay)) nguoi ) or ( tu manh duoc ((li nguoi) OR (loi nguoi)) ))".
• Adding a wildcard symbol may retrieve word variants: (( tu mach ((hoc tay) or (toc tay)) nguoi ) or ( tu manh duoc ((li nguoi) OR (loi nguoi)) ))*.