Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
danh vi » hanh vi, dinh vi, danh di
su can » su cao, tu can, su han
su van » tu van, vu van
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cau » va cau, ve cau, di cau
qua » quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su can) or (su van)) ky nang ma hoi. hieu qua hoat ((xuc va) or (tuc va)) danh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su can) OR (su van)) ky nang ma hoi. hieu qua hoat ((xuc va) OR (tuc va)) danh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su can) or (su van)) ky nang ma hoi. hieu qua hoat ((xuc va) or (tuc va)) danh vi cau tren*.