Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
vat thanh » dat thanh, gat thanh, tat thanh
sach thu » sach thue, sach thieu, sach tham
thu hanh » thuc hanh, thu thanh, thuy hanh
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
lam va » nam va, dam va, lam ha

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