Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
ban thanh » ban hanh, ban hang
thanh ve » hanh ve, thanh va, thanh vien
cac truc » cau truc, cac tru, cac trung
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
he nam » nghe nam
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu hoach)) ky nang ma hoi. hieu ((he nam) or (ha nam)) thuoc ban thanh ve cac truc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky nang ma hoi. hieu ((he nam) OR (ha nam)) thuoc ban thanh ve cac truc.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky nang ma hoi. hieu ((he nam) or (ha nam)) thuoc ban thanh ve cac truc*.