Perhaps you should try some spelling variations:
lam nguoi » dao nguoi, tay nguoi
manh duoc » hanh duoc, nganh duoc, doanh duoc
loi nguoi » loai nguoi, moi nguoi, doi nguoi
hach hoc » cach hoc, mach hoc, hoach hoi
le nguoi » ly nguoi, den nguoi, _ nguoi
tu hach » tu hanh, tu cach, tu sach
hoc lam » duoc lam
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 hach hoc lam nguoi ) or ( tu manh duoc ((le nguoi) OR (loi nguoi)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hach hoc lam nguoi ) OR ( tu manh duoc ((le nguoi) OR (loi nguoi)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu hach hoc lam nguoi ) or ( tu manh duoc ((le nguoi) OR (loi nguoi)) ))".
• Adding a wildcard symbol may retrieve word variants: (( tu hach hoc lam nguoi ) or ( tu manh duoc ((le nguoi) OR (loi nguoi)) ))*.