Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan manh » dang manh, doan manh, van manh
manh vai » manh hai, manh va, manh khai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu va » lieu va, hieu qua
ca viet » va viet, co viet, hoa viet
vai ca » vai cac, vai cua, bai ca
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 ky nang x hoi. ((hieu ve) or (hieu va)) am thuc dan manh vai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((hieu ve) OR (hieu va)) am thuc dan manh vai ca viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu ve) or (hieu va)) am thuc dan manh vai ca viet*.