Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
toc sach » hoc sach, doc sach, thuoc sach
va triet » va thiet, ve triet, cua triet
phat xuc » chat xuc, phat xuat, phap xu
va trien » va truyen, va thiet, va tuyen
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
dao vai » dao van, dao va, dao bai
xuc va » duc va, tuc va, luc va
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (thuat san)) ky nang xa hoi. hieu va phat xuc va dao vai ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuat san)) ky nang xa hoi. hieu va phat xuc va dao vai ((va triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (thuat san)) ky nang xa hoi. hieu va phat xuc va dao vai ((va triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuat san)) ky nang xa hoi. hieu va phat xuc va dao vai ((va triet) OR (va trien))*.