Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
hanh lam » thanh lap, dinh lam
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac
va hoi » xa hoi, va hoc, va hoa

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 thi hanh va hoi. hieu ((ve cac) 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 thi hanh va hoi. hieu ((ve cac) OR (va cam)) tuc van ((hanh lam) OR (hanh kem)) ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh va hoi. hieu ((ve cac) or (va cam)) tuc van ((hanh lam) or (hanh kem)) ve triet*.