Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
mai hoi » mai khoi, dai hoi, lai hoi
xa hanh » xa thanh, xa khanh, va hanh
cam ky » cao ky, cac ky
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
ma hoi » xa hoi, ma hoa, me hoi
vi cau » va cau, ve cau, di cau
tu cam » tu cham, tu cac, tu nam

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

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