Perhaps you should try some spelling variations:
pham chuc » pham huu, kham chua, pham huy
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hanh vai » hanh vi, hanh va, hanh tai
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
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 thu nang ma hoi. ((hieu ve) OR (hieu va)) ((pham chuc) or (pham duc)) va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu nang ma hoi. ((hieu ve) OR (hieu va)) ((pham chuc) OR (pham duc)) va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu nang ma hoi. ((hieu ve) OR (hieu va)) ((pham chuc) or (pham duc)) va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach thu nang ma hoi. ((hieu ve) OR (hieu va)) ((pham chuc) or (pham duc)) va hanh vai cua te*.