Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cam thuc » am thuc, nam thuc, cam thu
va trien » va truyen, va thiet, va tuyen
va triet » va thiet, ve triet, cua triet
sach thu » sach thue, sach thieu, sach tham
thuc van » thuc vat, thuc dan, thuc va
van hang » van khang, van hoang, van thang
thu nang » thi nang, thu hang, thu bang
hieu ve » hieu va, hieu van
hang vi » hang va, hanh vi, hang di
so sach » so sanh, bo sach, co sach
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ve cam thuc van hang vi ((((va triet) OR (va trien))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu nang x hoi. hieu ve cam thuc van hang vi ((((va triet) OR (va trien))) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu nang x hoi. hieu ve cam thuc van hang vi ((((va triet) OR (va trien))) or (su triet))*".