Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach thieu, sach tham
thu bang » thu ban, thu hang, chu bang
doan van » doan va, hoang van, luan van
cham xuc » cam xuc, chat xuc, cham soc
cua tre » cua te, cuu tre, dua tren
va doan » va doanh, van doan, va dan
tu sach » thu sach, su sach, te sach
hieu su » hieu sau, tieu su, hieu so
hieu vu » hieu va, hieu ve, dieu vu
bang xa » lang xa, bang va, mang xa
xuc va » duc va, tuc va, luc va

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 bang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va doan van ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu bang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va doan van ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu bang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va doan van ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach thu bang xa hoi. ((hieu vu) OR (hieu su)) cham xuc va doan van ((cua tre) or (cua triet))*.