Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach tay » xach tay, sach hay, sach nay
manh hai » lanh hai, minh hai, thanh hai
dang xay » dang van, van xay
hai cua » thai cua, dai cua, hoi cua
xa manh » ha manh, van manh, day manh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, lang van
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao

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 tay ((lang xa) OR (dang xay)) hoi. hieu ((ve cai) or (va cam)) tuc xa manh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tay ((lang xa) OR (dang xay)) hoi. hieu ((ve cai) OR (va cam)) tuc xa manh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tay ((lang xa) OR (dang xay)) hoi. hieu ((ve cai) or (va cam)) tuc xa manh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach tay ((lang xa) OR (dang xay)) hoi. hieu ((ve cai) or (va cam)) tuc xa manh hai cua triet*.