Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
thu sach » tu sach, thuat sach, thuoc sach
kho tang » cao tang
te sach » toc sach
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
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) or (thu sach)) kho tang ma hoa. hieu va cham ((luc va) OR (tuc va)) thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) kho tang ma hoa. hieu va cham ((luc va) OR (tuc va)) thanh vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) kho tang ma hoa. hieu va cham ((luc va) OR (tuc va)) thanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) kho tang ma hoa. hieu va cham ((luc va) OR (tuc va)) thanh vi su triet*.