Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
dang xay » dang van, van xay
trung ha » trung hoc, trung tam, trung cap
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
van cau » van dau, van hau, van chat
ha xanh » ha anh, ha manh, ha canh
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 van cau trung ha xanh ((di cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang x) OR (dang xay)) hoi. thi van cau trung ha xanh ((di cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang x) or (dang xay)) hoi. thi van cau trung ha xanh ((di cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang x) or (dang xay)) hoi. thi van cau trung ha xanh ((di cua) OR (dai cua)) tre*.