Perhaps you should try some spelling variations:
van chat » cao chat
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
ve chim » va chim, ve cham, ve chinh
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
tai va » thai va, mai va, tri va
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 ky nang ma hoi. hieu ((ve chim) or (van chat)) xuc va hanh tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. hieu ((ve chim) OR (van chat)) xuc va hanh tai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. hieu ((ve chim) or (van chat)) xuc va hanh tai va thiet*.