Perhaps you should try some spelling variations:
thien van » thi van
ban tinh » ban thanh, quan tinh, ban hanh
hieu van » hieu va, lieu va
tu sach » thu sach, su sach, te sach
tinh vi » trinh vi, tinh voi, tinh va
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
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: tu sach y lang xa hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam cuc ban tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. ((hieu ve) OR (((hieu van) OR (thien van)))) cam cuc ban tinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam cuc ban tinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam cuc ban tinh vi cua tre*.