Perhaps you should try some spelling variations:
truc van » truc va, thuc van, truc ban
cau tren » cu tren, dau tren, ca tren
cong ky » cuong ky, cong ty, dong ky
hong ky » thong ke
hieu ve » hieu va, hieu van
hanh ve » hanh va, hanh kem
ve cau » ke cau, va cau, ve cac
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((cong ky) OR (hong ky)) nang x hoi. hieu ve cau truc van ((hanh ve) or (hanh vi)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((cong ky) OR (hong ky)) nang x hoi. hieu ve cau truc van ((hanh ve) OR (hanh vi)) cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((cong ky) OR (hong ky)) nang x hoi. hieu ve cau truc van ((hanh ve) or (hanh vi)) cau tren*".