Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach tai » sach tham, sach dao, sach xa
thanh vi » hanh vi, thanh va, thanh ve
sach bai » sach dao, cac bai, sach xa
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
tuc va » truc va, tuc xa, duc va
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

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 tai) OR (sach bai)) lang xa hoi. hieu va cam ((tuc va) or (thuc va)) thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tai) OR (sach bai)) lang xa hoi. hieu va cam ((tuc va) OR (thuc va)) thanh vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tai) OR (sach bai)) lang xa hoi. hieu va cam ((tuc va) or (thuc va)) thanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach tai) OR (sach bai)) lang xa hoi. hieu va cam ((tuc va) or (thuc va)) thanh vi su triet*.