Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
sach thu » sach thue, sach thieu, sach tham
thu sang » thu hang, thu san, thu bang
hanh vai » hanh vi, hanh va, hanh tai
so sach » so sanh, bo sach, co sach
sang ma » tang ma, nang ma, sang tao
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham
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 sach thu sang ma hoi. hieu v pham thuc va hanh vai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu sang ma hoi. hieu v pham thuc va hanh vai ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: so sach thu sang ma hoi. hieu v pham thuc va hanh vai ((cua te) or (cua tu))*.