Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van hanh » van thanh, ban hanh, van anh
hieu cua » hieu qua, dieu cua, bieu cua
dang xay » dang van, van xay
lang xa » lang ha, lang van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
vi cua » vai cua, di 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) or (thu hoach)) y ((lang xa) OR (dang xay)) hoi. hieu cua cac xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) y ((lang xa) OR (dang xay)) hoi. hieu cua cac xuc van hanh vi cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu hoach)) y ((lang xa) OR (dang xay)) hoi. hieu cua cac xuc van hanh vi cua viet*".