Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tang ma » mang may, tang van
nang te » nang tu, nang he, nang ty
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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 hoi. hieu ve cam ((xuc va) OR (tuc 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 hoi. hieu ve cam ((xuc va) OR (tuc 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 hoi. hieu ve cam ((xuc va) OR (tuc va)) nang te cua te*".