Perhaps you should try some spelling variations:
tinh vai » tinh hai, tinh bai, tinh lai
cau tren » cu tren, dau tren, ca tren
cau treo » cau theo, cau triet, cau trieu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc may » duc mau, duc man, duc manh
tinh va » tich va, trinh van, trinh vat
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang xa hoi. hieu ve cac duc may ((tinh vai) OR (tinh va)) ((cau tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang xa hoi. hieu ve cac duc may ((tinh vai) OR (tinh va)) ((cau tren) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang xa hoi. hieu ve cac duc may ((tinh vai) OR (tinh va)) ((cau tren) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang xa hoi. hieu ve cac duc may ((tinh vai) OR (tinh va)) ((cau tren) or (cau treo))*.