Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien
ve triet » va trien
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
van dam » van nam, van dao, van dau
va hanh » van hanh, va danh, ban hanh
dam tu » nam tu, cam tu, tam tu

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