Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
le dat » de dat, le dac, ve dat
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 y nang ma hoi. hieu ((le dat) OR (le dan)) nuoc va hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ma hoi. hieu ((le dat) OR (le dan)) nuoc va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. hieu ((le dat) OR (le dan)) nuoc va hanh vi cuu tre*.