Perhaps you should try some spelling variations:
caim luc » cau luc
cai tren » cai tien, ca tren, cau tren
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va, hanh kem
va hanh » van hanh, va thanh, va danh
lang xa » lang ha, dang xay, lang van
ve caim » ve chim
ve cai » va cai, ve cac, ve tai
luc va » duc va, tuc va, loc va
tu dan » tuc dan, tu ban, tu can
cu dan » cua dan, ca dan, co dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu dan) OR (cu dan)) ky ((lang xa) or (nang x)) hoi. hieu ve caim luc va hanh ve cai tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu dan) OR (cu dan)) ky ((lang xa) OR (nang x)) hoi. hieu ve caim luc va hanh ve cai tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu dan) OR (cu dan)) ky ((lang xa) or (nang x)) hoi. hieu ve caim luc va hanh ve cai tren*".