Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang ra » nang ma, lang ra, nang ro
xuc van » duc van, luc van, vuc van
sach ty » sach y, sach tu, sach thu
va cao » va cac, va co, va dao
vi cua » vai cua, di cua
va cam » va cham, va cac, va cai
cua te » cua tu

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 ty ((nang cao) or (nang ra)) hoi. lieu ((va cam) OR (va cao)) xuc van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang cao) OR (nang ra)) hoi. lieu ((va cam) OR (va cao)) xuc van hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang cao) or (nang ra)) hoi. lieu ((va cam) OR (va cao)) xuc van hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang cao) or (nang ra)) hoi. lieu ((va cam) OR (va cao)) xuc van hanh vi cua te*.