Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
van dau » van dao, phan dau
van cau » van hau, van chat, toan cau
sach ky » sac ky, sach y, sach ty
te sach » toc sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va
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: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ((van cau) or (van dau)) xuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ((van cau) OR (van dau)) xuc va hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (nang ma)) hoi. hieu ((van cau) or (van dau)) xuc va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ((van cau) or (van dau)) xuc va hanh vi cuu tre*.