Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh dai » danh dau, danh di, danh sai
toc sach » hoc sach, doc sach, thuoc sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
luc va » tuc va, loc va
y tang » ky tang, 6 tang, 7 tang
dai su » dai sua, dai so, dan 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 (toc sach)) y tang ma hoi. hieu ve cham ((luc va) OR (duc va)) danh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y tang ma hoi. hieu ve cham ((luc va) OR (duc va)) danh dai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) y tang ma hoi. hieu ve cham ((luc va) OR (duc va)) danh dai su triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y tang ma hoi. hieu ve cham ((luc va) OR (duc va)) danh dai su triet*.