Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
thuc van » thuc vat, thuc dan, thuc va
su triet » su viet, ve triet
hang don » hang ton, hang doi, dang don
van hang » van khang, van hoang, van thang
su sach » so sach, vu sach
hieu va » lieu va
su tien » su kien, su hien, tu tieng
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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: su sach v nang x hoi. ((hieu va) or (hieu qua)) cac thuc van hang don ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang x hoi. ((hieu va) OR (hieu qua)) cac thuc van hang don ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x hoi. ((hieu va) or (hieu qua)) cac thuc van hang don ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. ((hieu va) or (hieu qua)) cac thuc van hang don ((su triet) OR (su tien))*.