Perhaps you should try some spelling variations:
tang van » dang van, hoang van, trong van
so sanh » do sanh
cac thu » cach thuc, cac thoi
va dinh » van dinh, va kinh, va tinh
dinh di » dinh du, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
sanh y » sinh y, anh y, hanh y
thu va » thuc va, thue va, tu va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y ((nang x) or (tang van)) hoi. lieu va cac thu va dinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((nang x) OR (tang van)) hoi. lieu va cac thu va dinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh y ((nang x) or (tang van)) hoi. lieu va cac thu va dinh di cua tre*.