Perhaps you should try some spelling variations:
trien kinh » tri kinh, trinh kinh, trien dich
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
tuan thong » toan thong, tran thong, tuan phong
thong van » trong van, thong quan, truong van
thong va » thong cua, truong va, thong qua
chan dau » phan dau, han dau, chan doan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((trien kinh) OR (chieu sang)) - hanh trung tuan thong ((thong van) OR (thong va)) chan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((trien kinh) or (chieu sang)) - hanh trung tuan thong ((thong van) OR (thong va)) chan dau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((trien kinh) or (chieu sang)) - hanh trung tuan thong ((thong van) OR (thong va)) chan dau*.