Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
va danh » va dinh, va dan, va hanh
cam tao » cau tao, cai tao, cam tay
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, xach tay
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) OR (sach thu)) nang x hoi. hieu van cam tao va danh ((vi luu) or (vi lua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach thu)) nang x hoi. hieu van cam tao va danh ((vi luu) OR (vi lua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach thu)) nang x hoi. hieu van cam tao va danh ((vi luu) or (vi lua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) OR (sach thu)) nang x hoi. hieu van cam tao va danh ((vi luu) or (vi lua)) tre*.