Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
va triet » va thiet, va trien, cua triet
xanh tai » hanh tai, anh tai, vanh tai
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va xanh » va danh, va hanh, va anh
tuc va » thuc va, truc va, tuc xa
co tuc » co thuc, co tu, co toc
va co » vo co

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ky nang xa hoi. hieu va co tuc va xanh tai ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ky nang xa hoi. hieu va co tuc va xanh tai ((va triet) or (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) ky nang xa hoi. hieu va co tuc va xanh tai ((va triet) or (ve triet))*.