Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
hanh vai » hanh vi, hanh va, hanh tai
thu nang » thi nang, thu hang, thu bang
van hanh » van thanh, ban hanh, van anh
chuc van » chu van, chuc va, thuc van
ve pham » vi pham, v pham, ve phan
vai cua » dai cua, hai cua, lai cua
so sach » bo sach, co sach, hoc sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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) or (so sanh)) thu nang ma hoi. hieu ve pham chuc van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) thu nang ma hoi. hieu ve pham chuc van hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) thu nang ma hoi. hieu ve pham chuc van hanh vai cua te*.