Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan tai » hang tai, van tai, toan tai
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » truc va, tuc xa, thuc vat
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: thu sach ky nang ma hoi. lieu va cham ((((tuc va) or (thuc va))) or (duc va)) nhan tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoi. lieu va cham ((((tuc va) OR (thuc va))) OR (duc va)) nhan tai va thiet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoi. lieu va cham ((((tuc va) or (thuc va))) or (duc va)) nhan tai va thiet*.