Perhaps you should try some spelling variations:
sang cho » danh cho, dung cho, sang tao
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
van cau » van dau, van hau, van chat
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
nang co » nang cao, nang doc, nang noi
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (so sanh)) y ((nang co) or (sang cho)) hoi. hieu van cau truc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y ((nang co) OR (sang cho)) hoi. hieu van cau truc va hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) y ((nang co) or (sang cho)) hoi. hieu van cau truc va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) y ((nang co) or (sang cho)) hoi. hieu van cau truc va hanh vi cuu tre*.