Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
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 danh » va dinh, va dan, va 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 thanh) OR (gia thanh))) or (va danh)) 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 thanh) OR (gia thanh))) OR (va danh)) ki su 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 (gia thanh))) or (va danh)) ki su triet*".