Perhaps you should try some spelling variations:
tinh bai » tinh bac, tinh hai, hinh bai
cau tren » cu tren, dau tren, ca tren
cau treo » cau theo, cau triet, cau trieu
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc may » duc mau, duc man, duc manh
ma hoi » mai hoi, xa hoi, ma hoa
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 ma hoi. hieu ve cac duc may tinh bai ((cau tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ma hoi. hieu ve cac duc may tinh bai ((cau tren) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ma hoi. hieu ve cac duc may tinh bai ((cau tren) or (cau treo))*.