Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
thi nang » thi cong, ki nang, thi hanh
hang hoi » hang hoa, hang hai, hang doi
sach thi » sach thu, sach tai, sach thieu
so sach » so sanh, bo sach, co sach
va hang » van hang, va nang, va lang
chuc va » thuc va, thuc vat
ve pham » vi pham, v pham, ve phan
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
chuc te » thuc te, chuc ke, chuc theo
ma hoi » ma hoa, me hoi, va hoi

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 thi nang ((((ma hoi) or (xa hoi))) or (mai hoi)). hieu ve pham chuc va hang hoi chuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thi nang ((((ma hoi) OR (xa hoi))) OR (mai hoi)). hieu ve pham chuc va hang hoi chuc te.
• Adding a wildcard symbol may retrieve word variants: so sach thi nang ((((ma hoi) or (xa hoi))) or (mai hoi)). hieu ve pham chuc va hang hoi chuc te*.