Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cam » van nam, van lam, van cau
va danh » va dinh, va hanh, dia danh
cam tu » cam thu, nam tu, dam tu
va dan » ca dan, va dao, va dau
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 ty nang x ho. hieu van cam tu ((va thanh) or (((va danh) OR (va dan)))) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x ho. hieu van cam tu ((va thanh) OR (((va danh) OR (va dan)))) ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang x ho. hieu van cam tu ((va thanh) or (((va danh) OR (va dan)))) ki su triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x ho. hieu van cam tu ((va thanh) or (((va danh) OR (va dan)))) ki su triet*.