Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
thuy hanh » thuc hanh, thuy anh, thuy canh
sach thuy » sach thu, sach thue, sach tham
va thieu » va thiet, va hieu, va tieu
ve triet » va trien, su triet
va thanh » gia thanh, ban thanh, va tinh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
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 thuy hanh xa hoi. hieu ((ve cam) or (va cam)) thuc va thanh lap ((ve triet) or (va thieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thuy hanh xa hoi. hieu ((ve cam) OR (va cam)) thuc va thanh lap ((ve triet) OR (va thieu)).
• Adding a wildcard symbol may retrieve word variants: tu sach thuy hanh xa hoi. hieu ((ve cam) or (va cam)) thuc va thanh lap ((ve triet) or (va thieu))*.