Perhaps you should try some spelling variations:
thien nang » thien bang, thien dang, trien nang
hoc thien » hoc hien, hoc thieu, hoc thiet
canh manh » lanh manh, canh tranh, cach mang
cua trong » cua truong, qua trong, ca trong
cua trung » cua truong, xuan trung, cua nhung
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien nang - canh manh ((cua trong) OR (cua trung)) cong tan phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien nang - canh manh ((cua trong) OR (cua trung)) cong tan phan dau*".