Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
xa hanh » xa thanh, xa khanh, va hanh
tu cam » tu cham, tu nam, tu can
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
vi cau » va cau, ve cau, di cau

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