Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh vap » trinh vat, trinh va, trinh lap
trinh van » trinh han, trinh quan, trinh toan
manh toan » thanh toan, anh tuan, tinh toan
hoc gian » hoc giao, hoc giai, hoc gia
gian dan » gian lang
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc gian dan - hanh ((trinh vap) OR (trinh van)) nhung cong ((manh toan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc gian dan - hanh ((trinh vap) OR (trinh van)) nhung cong ((manh toan) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc gian dan - hanh ((trinh vap) OR (trinh van)) nhung cong ((manh toan) or (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc gian dan - hanh ((trinh vap) OR (trinh van)) nhung cong ((manh toan) or (dan chan)) cau*.