Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
tu sach » thu sach, su sach, te sach
cam luc » cam xuc, cau luc
hai cuc » tai cuc, hai cua, thai cua
cuc tre » duc tre, cua tre, cuu tre
hieu ve » hieu va, hieu van
mau hoi » cau hoi, mai hoi, mau ho
ky danh » ky anh
ky dang » ky nang
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 dang) OR (ky danh)) mau hoi. hieu ve cam luc ((va thanh) or (gia thanh)) hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky danh)) mau hoi. hieu ve cam luc ((va thanh) OR (gia thanh)) hai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) OR (ky danh)) mau hoi. hieu ve cam luc ((va thanh) or (gia thanh)) hai cuc tre*".