Perhaps you should try some spelling variations:
van chat » cao chat
cach tu » cach thuc
sach tu » sach thu, sach ty, sach uu
van cau » van dau, van hau, toan cau
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach tu) OR (cach tu)) nang o hoi. thien ((van cau) or (van chat)) xuc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach tu) OR (cach tu)) nang o hoi. thien ((van cau) OR (van chat)) xuc va danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach tu) OR (cach tu)) nang o hoi. thien ((van cau) or (van chat)) xuc va danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach tu) OR (cach tu)) nang o hoi. thien ((van cau) or (van chat)) xuc va danh vi cua tre*.