Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
van lam » van nam
va tinh » may tinh
va danh » va dinh, va dan, va hanh
sai ky » sac 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 (sai ky)) nang x ho. hieu van lam tu ((va tinh) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sai ky)) nang x ho. hieu van lam tu ((va tinh) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) or (sai ky)) nang x ho. hieu van lam tu ((va tinh) or (va danh)) ki su triet*.