Perhaps you should try some spelling variations:
loai tren » la tren, thai tren
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
ve loai » va loai
hanh ve » hanh vi, hanh va, hanh kem
hieu ve » hieu van
vuc van » duc van, luc van, thuc van
cam vuc » cam xuc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (nang x)) hoi. ((hieu ve) or (hieu va)) cam vuc van hanh ve loai tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (hieu va)) cam vuc van hanh ve loai tren.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (nang x)) hoi. ((hieu ve) or (hieu va)) cam vuc van hanh ve loai tren*.