Perhaps you should try some spelling variations:
sang cho » danh cho, dung cho, sang tao
hieu van » thien van, lieu va, hieu ve
so sach » so sanh, bo sach, co sach
nang co » nang cao, nang doc, nang noi
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
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 y ((nang co) or (sang cho)) hoi. ((hieu van) OR (hieu va)) cau truc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang co) OR (sang cho)) hoi. ((hieu van) OR (hieu va)) cau truc va hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang co) or (sang cho)) hoi. ((hieu van) OR (hieu va)) cau truc va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang co) or (sang cho)) hoi. ((hieu van) OR (hieu va)) cau truc va hanh vi cuu tre*.