Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tai lang » tai cong, thi lan, va lang
thanh vi » hanh vi, thanh va, thanh ve
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
tai san » tai ngan
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
tuc va » truc va, tuc xa, duc va
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 lang) OR (tai san)) 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 lang) OR (tai san)) 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 lang) OR (tai san)) 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 lang) OR (tai san)) xa hoi. hieu va cam ((tuc va) or (thuc va)) thanh vi su triet*.