Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
sach ky » sach y, sach ty, sach kem
va danh » va dinh, va dan, va hanh
van lam » van nam
thi van » thi lan, thi hanh, thi nang
sac ky » cac ky, sai ky
lam tu » nam tu, cam tu, dam tu
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ky) OR (sac ky)) nang x ho. thi van lam tu ((ban thanh) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sac ky)) nang x ho. thi van lam tu ((ban thanh) OR (va danh)) ki su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sac ky)) nang x ho. thi van lam tu ((ban thanh) or (va danh)) ki su triet*".