Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham xuc » cam xuc, chat xuc, cham soc
va thanh » ban thanh, va tinh, le thanh
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty
vai va » mai va, dai va, lai va
ma hoi » mai hoi, xa hoi, ma hoa
hai va » hai van, thai va, hoi va
thiet » thieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ma hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) ((vai va) or (hai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) ((vai va) OR (hai va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ma hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) ((vai va) or (hai va)) thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) ((vai va) or (hai va)) thiet*.