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