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