Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
thuc va » thuc vat, thuc dan, thuc day
va hang » van hang, va nang, va lang
tai cua » thai cua, tri cua, dai cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc sach) or (hoc sinh)) ky lang xa hoi. hieu van nam thuc va hang ((tai cua) OR (tai cuc)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (hoc sinh)) ky lang xa hoi. hieu van nam thuc va hang ((tai cua) OR (tai cuc)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) or (hoc sinh)) ky lang xa hoi. hieu van nam thuc va hang ((tai cua) OR (tai cuc)) te".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) or (hoc sinh)) ky lang xa hoi. hieu van nam thuc va hang ((tai cua) OR (tai cuc)) te*.