Perhaps you should try some spelling variations:
vien cam » vien cac, vien nam, vien can
vien cao » vien cac, vien dai, vien da
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cua tuc » cua duc, cua tu, cua thuoc
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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