Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
hoc sach » hoc sinh, hoc cac, hoc anh
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
cao hoi » cau hoi, co hoi, cao hoc
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
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) OR (hoc sach)) thu nang cao hoi. hieu van pham thuc va hanh hai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) OR (hoc sach)) thu nang cao hoi. hieu van pham thuc va hanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: ((co sach) OR (hoc sach)) thu nang cao hoi. hieu van pham thuc va hanh hai cua te*.