Perhaps you should try some spelling variations:
phan khuc » phan khu, phan thuc, phan phuoc
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
sanh thu » sach thu, san thu, doanh thu
so sanh » do sanh
nang ma » tang ma, nang cao
va hanh » van hanh, va thanh, va danh
khuc va » khuc van, thuc va, chuc va
sang ma » tang ma, sang tao, sang tai
hieu ke » hieu kem, chieu ke, hieu ky
ke phan » ve phan, kenh phan, ke thang
cua tu » cua tuc, cua su, cua cu

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 thu ((((nang ma) or (mang may))) or (sang ma)) hoi. hieu ke phan khuc va hanh thai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh thu ((((nang ma) OR (mang may))) OR (sang ma)) hoi. hieu ke phan khuc va hanh thai cua tu.
• Adding a wildcard symbol may retrieve word variants: so sanh thu ((((nang ma) or (mang may))) or (sang ma)) hoi. hieu ke phan khuc va hanh thai cua tu*.