Perhaps you should try some spelling variations:
cua tuc » cua duc, cua tu, cua thuoc
va hanh » van hanh, va thanh, va danh
cach tu » cach thuc
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
sach tu » sach thu, sach ty, sach uu
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
tuc va » thuc va, truc va, tuc xa
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 tu) OR (cach tu)) lang xa hoi. ((hieu ve) or (hieu va)) cua tuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (cach tu)) lang xa hoi. ((hieu ve) OR (hieu va)) cua tuc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) OR (cach tu)) lang xa hoi. ((hieu ve) or (hieu va)) cua tuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) OR (cach tu)) lang xa hoi. ((hieu ve) or (hieu va)) cua tuc va hanh vi cua te*.