Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hanh nhan » thanh nhan, danh nhan, anh nhan
va phuong » va thuong, cac phuong
hanh han » hanh phan, hanh san, anh han
cong tan » cong tac, cong san, cong thanh
tan pha » tan phat, tan ha, ban pha
pha tap » pham tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - ((hanh han) or (hanh nhan)) va phuong cong tan pha tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - ((hanh han) OR (hanh nhan)) va phuong cong tan pha tap.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - ((hanh han) or (hanh nhan)) va phuong cong tan pha tap*.