Perhaps you should try some spelling variations:
trong luong » trong tuong, thuong luong, trong thuong
trinh toan » tinh toan, thanh toan, trinh han
doi chieu » doc hieu, doi chi, mot chieu
trinh van » trinh han, trinh quan, dinh van
ho chieu » theo chieu, hoc thieu, mot chieu
luong va » dung va
toan cau » toan cao, toan ban, toan tap
va toan » van toan, bai toan, tap toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) tinh - hanh ((trinh van) OR (trinh toan)) trong luong va toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - hanh ((trinh van) OR (trinh toan)) trong luong va toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) tinh - hanh ((trinh van) OR (trinh toan)) trong luong va toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) tinh - hanh ((trinh van) OR (trinh toan)) trong luong va toan cau*.