Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thu nang » thi nang, thu hang, thu bang
ban hanh » ban hang
thu sach » thuat sach, thuoc sach, thu hoach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
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 sach)) thu nang ma hoi. hieu va cac xuc ((va hanh) or (ban hanh)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) thu nang ma hoi. hieu va cac xuc ((va hanh) OR (ban hanh)) vi cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) thu nang ma hoi. hieu va cac xuc ((va hanh) or (ban hanh)) vi cua viet*".