Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang te » nang tu, nang he, nang ty
va nang » van nang, da nang, cam nang
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
xuc va » duc va, tuc va, luc va
te cua » tue cua, le cua, de cua
cua te » cua tu

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) or (su sach)) ky tang ma hoa. hieu ((ve cham) OR (va cham)) xuc va nang te cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky tang ma hoa. hieu ((ve cham) OR (va cham)) xuc va nang te cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ky tang ma hoa. hieu ((ve cham) OR (va cham)) xuc va nang te cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky tang ma hoa. hieu ((ve cham) OR (va cham)) xuc va nang te cua te*.