Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » truc va, tuc xa, duc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky sang ma hoi. hieu ve cham ((tuc va) or (thuc va)) thanh dat ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang ma hoi. hieu ve cham ((tuc va) OR (thuc va)) thanh dat ((va triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky sang ma hoi. hieu ve cham ((tuc va) or (thuc va)) thanh dat ((va triet) or (ve triet))*.