Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cay phoi » cap phoi, tay hoi, cay cho
hieu van » hieu va, thien van, lieu va
dinh sai » dinh tai, danh sai, dinh hai
ve triet » va trien, su triet
ky dang » ky nang, ky danh
van cam » van nam, van lam, van cau
va dinh » van dinh, va kinh, va tinh
cua tuc » cua duc, cua tu, cua thuoc
y dang » 2 dang, _ dang, b dang
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: toc sach ((y dang) OR (ky dang)) cay phoi. hieu van cam xuc va dinh sai ((ve triet) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y dang) OR (ky dang)) cay phoi. hieu van cam xuc va dinh sai ((ve triet) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y dang) OR (ky dang)) cay phoi. hieu van cam xuc va dinh sai ((ve triet) or (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y dang) OR (ky dang)) cay phoi. hieu van cam xuc va dinh sai ((ve triet) or (cua tuc))*.