Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue hanh » thue thanh, thuc hanh, thuy hanh
van thanh » ban thanh, van tuan
thanh lam » thanh lap, hanh lam, thanh nam
thuc van » thuc vat, thuc dan, thuc va
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao
lam ve » la ve, lam vu, nam ve

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