Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
nang cau » nang cao, hang cau, nang dau
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cao suc » cao su, cao duc
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua te » cua tu

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 cau hoi. hieu ve ((pham duc) or (cao suc)) ((va hanh) or (ban thanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang cau hoi. hieu ve ((pham duc) OR (cao suc)) ((va hanh) OR (ban thanh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang cau hoi. hieu ve ((pham duc) or (cao suc)) ((va hanh) or (ban thanh)) vi cua te*.