Perhaps you should try some spelling variations:
doan manh » doan minh, hoang manh, tran manh
nam thuc » nam thuoc, am thuc, nam thu
dan manh » dang manh, van manh, day manh
tu sach » thu sach, te sach, tu cach
hieu le » hieu ve, hieu he, hieu ly
su sach » so sach, vu sach
so viet » hoc viet
le nam » ly nam, he nam, le na
vai so » dai so, tai so, va so
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky nang x hoi. hieu le nam thuc ((dan manh) or (doan manh)) vai so viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu le nam thuc ((dan manh) OR (doan manh)) vai so viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang x hoi. hieu le nam thuc ((dan manh) or (doan manh)) vai so viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang x hoi. hieu le nam thuc ((dan manh) or (doan manh)) vai so viet*.