Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
truong quan » trong quan, thong quan, luong quan
chieu xanh » chieu sach, chieu sang, chieu tinh
truong cua » truong ca, truong cao, huong cua
tong luong » trong luong, cong luong, thuong luong
luong tac » luong tai, luong cac, tuong tac
tuyen » truyen, quyen

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (thien thanh)) - hanh ((truong cua) OR (truong quan)) tong luong tac tuyen tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien thanh)) - hanh ((truong cua) OR (truong quan)) tong luong tac tuyen tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (thien thanh)) - hanh ((truong cua) OR (truong quan)) tong luong tac tuyen tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien thanh)) - hanh ((truong cua) OR (truong quan)) tong luong tac tuyen tap*.