Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh dan » thanh dan, hanh san, canh dan
thi hang » thi hanh, thi nang, thi hong
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, tu cach
hang xa » hoang xa, hang va, hang ca
te sach » toc sach
dan su » dang su
ve cam » ve cac, va cam, ve cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) thi hang xa hoi. hieu ((ve cam) OR (ve cham)) thuc va hanh dan su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thi hang xa hoi. hieu ((ve cam) OR (ve cham)) thuc va hanh dan su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) thi hang xa hoi. hieu ((ve cam) OR (ve cham)) thuc va hanh dan su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) thi hang xa hoi. hieu ((ve cam) OR (ve cham)) thuc va hanh dan su triet*.