Perhaps you should try some spelling variations:
dau trung » dac trung, dau trong, dai trung
dang xay » dang van, van xay
thi hanh » thi thanh
hanh dau » hang dau, danh dau, han dau
trung va » truong va, trang va, trung ha
te sach » toc sach
va xanh » va danh, va hanh, va anh
di cua » doi cua, de cua, do cua

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 ((nang x) or (dang xay)) hoi. thi hanh dau trung va xanh ((di cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang x) OR (dang xay)) hoi. thi hanh dau trung va xanh ((di cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang x) or (dang xay)) hoi. thi hanh dau trung va xanh ((di cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang x) or (dang xay)) hoi. thi hanh dau trung va xanh ((di cua) OR (dai cua)) triet*.