Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
hoc thien » hoc hien, hoc thieu, hoc thiet
trinh cap » trinh cau, trinh lap, trinh cac
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh 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 thien hach - hanh trinh cap ((((nhung cong) or (dung cong))) or (thong thong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh trinh cap ((((nhung cong) OR (dung cong))) OR (thong thong)) manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh trinh cap ((((nhung cong) or (dung cong))) or (thong thong)) manh toan cau*.