Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
cham duc » pham duc, cham soc, pham duy
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
lai cua » hai cua, lai chau

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 sang mai hoi. hieu ve cham duc va hanh ((((lai cua) or (thai cua))) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang mai hoi. hieu ve cham duc va hanh ((((lai cua) OR (thai cua))) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky sang mai hoi. hieu ve cham duc va hanh ((((lai cua) or (thai cua))) or (dai cua)) tre*.