Perhaps you should try some spelling variations:
lanh manh » lanh tranh, lan anh, van manh
hanh manh » hanh mang, hoang manh, thanh minh
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
sach ty » sach y, sach tu, sach thu
ca viet » va viet, co viet, hoa viet
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
vai ca » vai cac, vai cua, bai ca
va nam » van nam, ha nam, va nay
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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