Perhaps you should try some spelling variations:
so sach » bo sach, co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
so sanh » do sanh
cuu tre » cua tre, cau tren, cau treo
v nang » va nang, vu nang, van nang
ma hoi » mai hoi, xa hoi, ma hoa
ve dat » de dat, va dat, ve dao
le dan » ke dan
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) or (so sanh)) v nang ma hoi. hieu ((ve dat) or (le dan)) nuoc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) v nang ma hoi. hieu ((ve dat) OR (le dan)) nuoc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) v nang ma hoi. hieu ((ve dat) or (le dan)) nuoc va hanh vi cuu tre*.