Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
khong dung » thong dung, phuong dung, cuong dung
theo phap » thi phap
phap tinh » phap sinh, phap tieng, phap tang
hanh tang » anh tang, hanh mang, hanh tung
he khong » he thong
dung tac » dung tai, dung cac, dung tay
toan cau » toan cao, toan ban, toan tap
ran cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo phap tinh - ((hanh tang) or (hanh trang)) he khong dung tac ((ran cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo phap tinh - ((hanh tang) OR (hanh trang)) he khong dung tac ((ran cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: theo phap tinh - ((hanh tang) or (hanh trang)) he khong dung tac ((ran cau) or (toan cau))*.