Perhaps you should try some spelling variations:
tran manh » tran minh, tran thanh, tran van
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
dan manh » dang manh, doan manh, van manh
hieu le » hieu ve, hieu he, hieu ly
co viet » so viet, hoc viet, hoa viet
sach ky » sac ky, sach y, sach ty
le nam » ly nam, he nam, le na
o viet » so viet, hoc viet
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: thu sach ky nang x hoi. hieu le nam thuc ((dan manh) or (tran manh)) vai ((co viet) or (o viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu le nam thuc ((dan manh) OR (tran manh)) vai ((co viet) OR (o viet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu le nam thuc ((dan manh) or (tran manh)) vai ((co viet) or (o viet))*.