Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach thi » sach thu, sach tai, sach thieu
thanh xa » thanh ha, thanh va, thanh ba
hanh lai » hanh lam, hanh tai, thanh lap
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
hieu ve » hieu va
tuc va » truc va, tuc xa, duc va
lai ve » loai ve, lai va, la ve

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thi thanh xa hoi. ((hieu ve) or (hieu van)) cam ((tuc va) or (thuc va)) hanh lai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi thanh xa hoi. ((hieu ve) OR (hieu van)) cam ((tuc va) OR (thuc va)) hanh lai ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach thi thanh xa hoi. ((hieu ve) or (hieu van)) cam ((tuc va) or (thuc va)) hanh lai ve triet*.