Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
kinh van » dinh van, vinh van, binh van
kinh vai » kinh hai, kinh va, sinh vat
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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