Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tuong cua » truong cua, huong cua, thong cua
nang cong » nang song, dang cong, bang cong
tung cua » trung cua, dung cua, tang cua
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chinh sach) or (hieu lang)) - thanh ((tung cua) OR (tuong cua)) nang cong dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chinh sach) OR (hieu lang)) - thanh ((tung cua) OR (tuong cua)) nang cong dan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chinh sach) or (hieu lang)) - thanh ((tung cua) OR (tuong cua)) nang cong dan phan cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chinh sach) or (hieu lang)) - thanh ((tung cua) OR (tuong cua)) nang cong dan phan cac*.