Perhaps you should try some spelling variations:
thuc dai » thuc dan, thuc day, thuc tai
hang doi » hang di, hang loi, huong doi
dai hang » dai thang, dai han, dat hang
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach
cua tre » cuu tre, cua triet, dua tren
vu sach » vu bach, vu khach
hieu ve » hieu va, hieu van
ve nam » he nam, va nam, le nam
y nang » ky nang, ly nang, v nang
cua te » cua tu
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) or (vu sach)) y nang x hoi. hieu ve nam thuc dai hang doi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang x hoi. hieu ve nam thuc dai hang doi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) y nang x hoi. hieu ve nam thuc dai hang doi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang x hoi. hieu ve nam thuc dai hang doi ((cua tre) OR (cua te))*.