Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
va tinh » may tinh
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
va dam » van dam, va dao, va dau
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 y nang x ho. lieu va dam tu ((va tinh) or (((va danh) or (ban hanh)))) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x ho. lieu va dam tu ((va tinh) OR (((va danh) OR (ban hanh)))) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x ho. lieu va dam tu ((va tinh) or (((va danh) or (ban hanh)))) ki su triet*.