Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cac xuc » cac nuoc, chat xuc, cac cuoc
dau thi » cau thi, dan thi, dao thi
huu tre » cuu tre, huu them, huu tien
huu tri » huu tai
ma hoi » mai hoi, xa hoi, ma hoa
va dau » va dao

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 ky nang ma hoi. lieu va ((cac xuc) or (cam xuc)) va dau thi ((huu tre) OR (huu tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. lieu va ((cac xuc) OR (cam xuc)) va dau thi ((huu tre) OR (huu tri)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. lieu va ((cac xuc) or (cam xuc)) va dau thi ((huu tre) OR (huu tri))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. lieu va ((cac xuc) or (cam xuc)) va dau thi ((huu tre) OR (huu tri))*.