Perhaps you should try some spelling variations:
trinh voi » trinh hoi, trinh vi, trinh boi
lang van » dang van, tang van, hoang van
tinh voi » tinh doi, binh voi, minh voi
hieu van » hieu va, thien van, lieu va
so sanh » do sanh
van cam » van nam, van lam, van cau
sanh ky » hanh ky, sang ky, nganh ky
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ky ((lang van) or (nang ma)) hoi. hieu van cam xuc va ((tinh voi) OR (trinh voi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky ((lang van) OR (nang ma)) hoi. hieu van cam xuc va ((tinh voi) OR (trinh voi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky ((lang van) or (nang ma)) hoi. hieu van cam xuc va ((tinh voi) OR (trinh voi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sanh ky ((lang van) or (nang ma)) hoi. hieu van cam xuc va ((tinh voi) OR (trinh voi)) cua tre*.