Perhaps you should try some spelling variations:
trung thanh » truong thanh
nhanh lang » nhanh quang, nhanh thang, nhan dang
rong thanh » dong thanh, cong thanh, truong thanh
lang van » dang van, tang van, hoang van
van dung » van dong, xay dung, tin dung
toan cao » toan ban, toan tap
theo bi » theo doi
theo bo » thao bo, theo doi, theo don

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo bi) OR (theo bo)) tinh - nhanh lang van dung ((trung thanh) or (rong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo bi) OR (theo bo)) tinh - nhanh lang van dung ((trung thanh) OR (rong thanh)) toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo bi) OR (theo bo)) tinh - nhanh lang van dung ((trung thanh) or (rong thanh)) toan cao*".