Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
hanh hai » thanh hai, nhanh hai, hang hai
co sach » bo sach, cuon sach, hoc sach
cao hoi » cau hoi, cao hoc, tao hoi
chuc va » thuc va, thuc vat
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
co hoi » co hoc, co loi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach thu nang ((cao hoi) OR (co hoi)). hieu van pham chuc va hanh hai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach thu nang ((cao hoi) OR (co hoi)). hieu van pham chuc va hanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: co sach thu nang ((cao hoi) OR (co hoi)). hieu van pham chuc va hanh hai cua te*.