Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuoc sach, thu hoach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao

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