Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
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
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 thu nang x ho. hieu van dam tu ((va thanh) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thu nang x ho. hieu van dam tu ((va thanh) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach thu nang x ho. hieu van dam tu ((va thanh) or (va danh)) ki su triet*.