Perhaps you should try some spelling variations:
pham chuc » pham huu, kham chua, pham huy
sanh thu » sach thu, san thu, doanh thu
so sanh » do sanh
nang ma » tang ma, sang ma, mang may
hieu ve » hieu va, hieu van
va hang » van hang, va nang, va lang
va cua » va chua, via cua, ca cua
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 (nang cao)) hoi. hieu ve ((pham chuc) or (pham duc)) va hang va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh thu ((nang ma) OR (nang cao)) hoi. hieu ve ((pham chuc) OR (pham duc)) va hang va cua tu.
• Adding a wildcard symbol may retrieve word variants: so sanh thu ((nang ma) or (nang cao)) hoi. hieu ve ((pham chuc) or (pham duc)) va hang va cua tu*.