Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, mang may
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thieu ((nang ma) OR (nang cao)) hoi. hieu ((ve cam) or (vu cham)) xuc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu ((nang ma) OR (nang cao)) hoi. hieu ((ve cam) OR (vu cham)) xuc va hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thieu ((nang ma) OR (nang cao)) hoi. hieu ((ve cam) or (vu cham)) xuc va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach thieu ((nang ma) OR (nang cao)) hoi. hieu ((ve cam) or (vu cham)) xuc va hanh vi cua viet*.