Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va triet » va thiet, ve triet, cua triet
va trien » va truyen, va thiet, va tuyen
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
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: thuat sach ty nang x hoi. hieu va cam xuc ((va hanh) or (va van)) than ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang x hoi. hieu va cam xuc ((va hanh) OR (va van)) than ((va triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty nang x hoi. hieu va cam xuc ((va hanh) or (va van)) than ((va triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang x hoi. hieu va cam xuc ((va hanh) or (va van)) than ((va triet) OR (va trien))*.