Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
te sach » toc sach
cam duc » cam xuc, cao duc, pham duc
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
me hoi » le 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: te sach ky nang ((me hoi) or (ma hoa)). hieu ve cam duc van thanh ((vai cua) OR (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((me hoi) OR (ma hoa)). hieu ve cam duc van thanh ((vai cua) OR (lai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((me hoi) or (ma hoa)). hieu ve cam duc van thanh ((vai cua) OR (lai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((me hoi) or (ma hoa)). hieu ve cam duc van thanh ((vai cua) OR (lai cua)) tre*.