Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hieu le » hieu ve, hieu he, hieu ly
ly nang » ky nang, ly hang, ly vang
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, v nang, may nang
le dat » le dan, de dat, le dac
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) or (ly nang)) ma hoi. hieu le dat (nuoc OR duoc) va danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y nang) OR (ly nang)) ma hoi. hieu le dat (nuoc OR duoc) va danh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((y nang) or (ly nang)) ma hoi. hieu le dat (nuoc OR duoc) va danh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach ((y nang) or (ly nang)) ma hoi. hieu le dat (nuoc OR duoc) va danh vi cuu tre*.