Perhaps you should try some spelling variations:
trinh cong » trinh dung
doi chieu » doi chi, ho chieu, mot chieu
doc hieu » toc thieu, hoc thieu, hoc hien
sinh qua » sinh quan, tinh quan, trinh qua
sinh cua » manh cua, dinh cuu, sinh va
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) tinh - nhanh ((sinh qua) or (sinh cua)) trinh cong tan tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) tinh - nhanh ((sinh qua) OR (sinh cua)) trinh cong tan tran ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) tinh - nhanh ((sinh qua) or (sinh cua)) trinh cong tan tran ban".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) tinh - nhanh ((sinh qua) or (sinh cua)) trinh cong tan tran ban*.