Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
chat tu » nhat tu, chai tu, chay tu
va danh » va dinh, va dan, va hanh
su tien » su kien, tu tieng, dau tien
su hien » su kien, thu hien, nhu hien

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 nang x ho. hieu van chat tu ((va thanh) or (va danh)) ki ((su tien) OR (su hien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x ho. hieu van chat tu ((va thanh) OR (va danh)) ki ((su tien) OR (su hien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x ho. hieu van chat tu ((va thanh) or (va danh)) ki ((su tien) OR (su hien))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x ho. hieu van chat tu ((va thanh) or (va danh)) ki ((su tien) OR (su hien))*.