Perhaps you should try some spelling variations:
tap quan » tac quan, hai quan
phan tap » phan lap, han tap, pha tap
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
quan cu » quan cua, quang cu, quan cau
ky tang » ky nang, ky dang, kho tang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam

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 tang ((ma hoi) OR (xa hoi)). hieu ve cam ((xuc va) or (tuc va)) phan tap quan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ((ma hoi) OR (xa hoi)). hieu ve cam ((xuc va) OR (tuc va)) phan tap quan cu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ((ma hoi) OR (xa hoi)). hieu ve cam ((xuc va) or (tuc va)) phan tap quan cu*".