Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
duong cua » dung cua, duong qua, dong cua
huong cua » dung cua
hoc tien » hoc tieng, hoc hien, hoc vien
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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 tien) OR (hoc thiet)) anh - thanh ((duong cua) OR (huong cua)) thong cong dan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc tien) or (hoc thiet)) anh - thanh ((duong cua) OR (huong cua)) thong cong dan phan cau~".
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) or (hoc thiet)) anh - thanh ((duong cua) OR (huong cua)) thong cong dan phan cau*.