Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien hach » hien hanh
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
quang tuan » quang thanh, quan luan, quang cua
hieu cach » hieu cac, chieu sach, hieu ca
tranh va » tranh van, trang va, trinh va
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cach) or (((thien hach) OR (thien thanh)))) - canh tranh va nhung cong quang tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (((thien hach) OR (thien thanh)))) - canh tranh va nhung cong quang tuan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) or (((thien hach) OR (thien thanh)))) - canh tranh va nhung cong quang tuan cau*".