Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thieu xanh » chieu xanh, hieu manh, thien anh
nang sang » nang song, nong san
trong san » trong cac, cong san, dong san
thanh cac » hanh cac, thanh bac, thanh ca
sang qua » song qua, sang cua, nang quan
qua dung » quang dung, su dung, qua song
than cap » khan cap, thanh lap, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (thien thanh)) - nang sang qua dung trong san ((than cap) OR (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien thanh)) - nang sang qua dung trong san ((than cap) OR (thanh cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien thanh)) - nang sang qua dung trong san ((than cap) OR (thanh cac))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien thanh)) - nang sang qua dung trong san ((than cap) OR (thanh cac))*.