Perhaps you should try some spelling variations:
sach thuy » sach thu, sach thue, sach tham
thuy hanh » thuc hanh, thuy anh, thuy canh
hanh hai » thanh hai, nhanh hai, hang hai
cua viet » ca viet, hoa viet, cua vat
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thuy hanh xa hoi. hieu ve am thuc va hanh hai ((cua viet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thuy hanh xa hoi. hieu ve am thuc va hanh hai ((cua viet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thuy hanh xa hoi. hieu ve am thuc va hanh hai ((cua viet) or (su triet))*.