Perhaps you should try some spelling variations:
van cham » van chat, van tham, van pham
cau tren » cu tren, dau tren, ca tren
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
te sac » te sach, te cac, te san
soc va » hoc va, loc va, doc va
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: te sac ((ky lang) OR (ky tang)) xa hoi. hieu ((van cham) or (va cham)) soc va hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky lang) OR (ky tang)) xa hoi. hieu ((van cham) OR (va cham)) soc va hanh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky lang) OR (ky tang)) xa hoi. hieu ((van cham) or (va cham)) soc va hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky lang) OR (ky tang)) xa hoi. hieu ((van cham) or (va cham)) soc va hanh vi cau tren*.