Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
su triet » su viet, su tien, ve triet
va tham » van tham, va cham, va thanh
thuc va » thuc vat, thuc day
lang xa » lang ha, dang xay, lang van
danh du » danh dau, danh tu, dinh du
te sach » toc sach
ve cam » ve cham, ve cac, va cam
y lang » o lang, _ lang, tay lang
du su » dau su, da su, de 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 y lang xa hoi. hieu ((ve cam) or (va tham)) ((thuc va) OR (thuc dan)) danh du su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. hieu ((ve cam) OR (va tham)) ((thuc va) OR (thuc dan)) danh du su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang xa hoi. hieu ((ve cam) or (va tham)) ((thuc va) OR (thuc dan)) danh du su triet".
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu ((ve cam) or (va tham)) ((thuc va) OR (thuc dan)) danh du su triet*.