Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh dai » danh dau, danh di, danh sai
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
te sach » toc sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach 2 » sach y
ma hoi » mai hoi, ma hoa, me hoi
2 tang » 2 thang, 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 2 tang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) or (thuc va)) danh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach 2 tang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) OR (thuc va)) danh dai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach 2 tang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) or (thuc va)) danh dai su triet".
• Adding a wildcard symbol may retrieve word variants: te sach 2 tang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) or (thuc va)) danh dai su triet*.