Perhaps you should try some spelling variations:
su sach » vu sach
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
han mai » han tai, ban mai, han mac
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
va han » va phan, van han, va hanh
thiet » thieu

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) or (so sach)) y nang ma hoi. hieu ((ve cham) or (ve chat)) tuc va han mai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang ma hoi. hieu ((ve cham) OR (ve chat)) tuc va han mai va thiet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang ma hoi. hieu ((ve cham) or (ve chat)) tuc va han mai va thiet*.