Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tao nano » tao nganh, cao nang, tao cao
hieu van » hieu va, thien van, lieu va
ty nano » tu nano, day nano
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
vai cua » hai cua, lai cua, bai cua
xuc va » duc va, tuc va, luc va

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