Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach thu » sach thue, sach thieu, sach tham
sach ty » sach y, sach tu, xach tay
dau dai » dat dai, sau dai, dau da
va cham » va chat, va tham
lang xa » lang ha, dang xay, lang van
va dau » va dao
dai su » dai sua, dai so, dan su
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) OR (sach thu)) lang xa hoi. hieu ((ve cam) or (va cham)) duc va dau dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) lang xa hoi. hieu ((ve cam) OR (va cham)) duc va dau dai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) lang xa hoi. hieu ((ve cam) or (va cham)) duc va dau dai su triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach thu)) lang xa hoi. hieu ((ve cam) or (va cham)) duc va dau dai su triet*.