Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam truc » cau truc, nam truc, lam truoc
toc sach » hoc sach, doc sach, thuoc sach
thi hang » thi hanh, thi nang, thi hong
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thu hang
truc va » thuc va, thuc vat, trung va
danh di » danh du, danh dien, danh gia
xanh di » vanh dai, xanh tai
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: toc sach ((ty hang) or (thi hang)) cau hoi. hieu va cam truc va ((danh di) OR (xanh di)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty hang) OR (thi hang)) cau hoi. hieu va cam truc va ((danh di) OR (xanh di)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ty hang) or (thi hang)) cau hoi. hieu va cam truc va ((danh di) OR (xanh di)) cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty hang) or (thi hang)) cau hoi. hieu va cam truc va ((danh di) OR (xanh di)) cua triet*.