Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
hanh mang » nhanh mang, hanh trang, thanh hang
dung cong » dung trong
theo cuu » theo chu, khao cuu, thao cua
anh tang » anh bang, anh dang, anh nang
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
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: theo cuu tinh - ((anh tang) or (((hanh mang) OR (nhanh lang)))) xay dung cong tam toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cuu tinh - ((anh tang) OR (((hanh mang) OR (nhanh lang)))) xay dung cong tam toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo cuu tinh - ((anh tang) or (((hanh mang) OR (nhanh lang)))) xay dung cong tam toan cao".
• Adding a wildcard symbol may retrieve word variants: theo cuu tinh - ((anh tang) or (((hanh mang) OR (nhanh lang)))) xay dung cong tam toan cao*.