Perhaps you should try some spelling variations:
danh tinh » doanh tinh, dang tinh, canh tinh
tinh cuu » trinh cuu, dinh cuu, tinh cua
so sach » bo sach, co sach, hoc sach
va danh » va dinh, va dan, va hanh
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
le dat » de dat, le dac, ve dat
le dan » ke dan
y nang » ky nang, ly nang, v nang

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)) y nang ma hoi. hieu ((le dat) or (le dan)) nuoc va danh tinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y nang ma hoi. hieu ((le dat) OR (le dan)) nuoc va danh tinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) y nang ma hoi. hieu ((le dat) or (le dan)) nuoc va danh tinh cuu tre*.