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

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