Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
sach thu » sach thue, sach thieu, sach tham
thu hanh » thuc hanh, thu thanh, thuy hanh
ve triet » va trien, su triet
hanh lam » thanh lap, hanh kem, hanh va
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao

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