Perhaps you should try some spelling variations:
khien thich » bien thich, kien trich, khuyen khich
thanh trung » thanh tung
khien tinh » thien tinh, bien tinh, dien tinh
nhung cong » dung cong, thong cong, hang cong
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
cong dan » cong san, cong tan, huong dan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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 ((khien tinh) OR (khien thich)) - thanh trung vap nhung cong dan ((phan cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((khien tinh) OR (khien thich)) - thanh trung vap nhung cong dan ((phan cau) or (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((khien tinh) OR (khien thich)) - thanh trung vap nhung cong dan ((phan cau) or (phan dau))*.