Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
sach ky » sach y, sach ty, sach kem
van lam » van nam
va danh » va dinh, va dan, va hanh
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. hieu van lam tu ((va 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. hieu van lam tu ((va thanh) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) or (sac ky)) nang x ho. hieu van lam tu ((va thanh) or (va danh)) ki su triet*.