Perhaps you should try some spelling variations:
giang cua » gian cua, giang qua, giang xua
so sanh » do sanh
va manh » van manh, va danh, va hanh
sanh ky » hanh ky, sang ky, nganh ky
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cua tre » cua te, cuu tre, cua triet
bai bo » bac bo, ban bo, bai so
bai mo » bai so

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky ((nang ma) or (tang ma)) hoi. hieu va ((bai bo) OR (bai mo)) va manh giang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky ((nang ma) OR (tang ma)) hoi. hieu va ((bai bo) OR (bai mo)) va manh giang cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky ((nang ma) or (tang ma)) hoi. hieu va ((bai bo) OR (bai mo)) va manh giang cua tre".
• Adding a wildcard symbol may retrieve word variants: so sanh ky ((nang ma) or (tang ma)) hoi. hieu va ((bai bo) OR (bai mo)) va manh giang cua tre*.