Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thanh trung » thanh tung
hanh trinh » canh tranh, hanh chinh
phuong lap » phuong la, phuong lan, phong lap
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
lap toan » tap toan, lap doanh, phap toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (hoc thieu)) tinh - ((thanh trung) or (hanh trinh)) va nhung phuong lap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc thieu)) tinh - ((thanh trung) OR (hanh trinh)) va nhung phuong lap toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc thieu)) tinh - ((thanh trung) or (hanh trinh)) va nhung phuong lap toan cau*.