Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
pham thuc » pham chuc, nham thuc, pham thu
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
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
ma hoi » mai hoi, xa hoi, ma hoa
hieu v » hieu va, hieu ve, hieu 2
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 v ((pham thuc) OR (phap thuc)) 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 v ((pham thuc) OR (phap thuc)) va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach thu nang ma hoi. hieu v ((pham thuc) OR (phap thuc)) va hanh vai cua te*.