Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
thanh toan » thanh hoa, thanh san, tinh toan
hoc thien » hoc hien, hoc thieu, hoc thiet
hang cong » dang cong, hang nong, bang cong
manh toan » anh tuan, tinh toan
trinh va » trinh van, trinh vat, trinh ve
san toan » van toan, dan toan, xuan toan
va hang » van hang, va nang, va lang

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 hach - hanh trinh va hang cong ((san toan) or (((manh toan) OR (thanh toan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh trinh va hang cong ((san toan) OR (((manh toan) OR (thanh toan)))) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - hanh trinh va hang cong ((san toan) or (((manh toan) OR (thanh toan)))) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh trinh va hang cong ((san toan) or (((manh toan) OR (thanh toan)))) cao*.