Perhaps you should try some spelling variations:
thien van » thi van
trung may » trung ma, trung gay, trung tam
lam trung » lam truong, nam trung, lam trong
cao tang » cao dang
su sach » so sach, vu sach
tinh vi » trinh vi, tinh voi, tinh va
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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 ((kho tang) OR (cao tang)) ma hoi. ((hieu ve) or (thien van)) lam trung may tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((kho tang) OR (cao tang)) ma hoi. ((hieu ve) OR (thien van)) lam trung may tinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((kho tang) OR (cao tang)) ma hoi. ((hieu ve) or (thien van)) lam trung may tinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((kho tang) OR (cao tang)) ma hoi. ((hieu ve) or (thien van)) lam trung may tinh vi cua tre*.