Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach thu » sach thue, sach thieu, sach tham
thu hanh » thuc hanh, thu thanh, thuy hanh
hanh may » hanh ma, hanh mau, hanh ngay
hanh lam » thanh lap, hanh va, dinh lam
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, te sach
may hoi » may thoi, tay hoi, mai hoi
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai

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