Perhaps you should try some spelling variations:
doan manh » doan minh, hoang manh, tran manh
dan manh » dang manh, van manh, day manh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu le » hieu ve, hieu he, hieu ly
le nam » ly nam, he nam, le na
o viet » so viet, hoc viet
x hoi » xa hoi, o hoi, x ho
vai o » va o, dai o, vi o

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 ty nang x hoi. hieu le nam thu ((dan manh) or (doan manh)) vai o viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu le nam thu ((dan manh) OR (doan manh)) vai o viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu le nam thu ((dan manh) or (doan manh)) vai o viet*.