Perhaps you should try some spelling variations:
nang tai » tang tai, sang tai, nang cao
hang tai » hang va, dung tai
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cham » va chat, va tham
bai cua » ban cua, bai ca, hai cua
soc va » hoc va, loc va, doc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang tai) or (hang tai)) roi. hieu va cham soc va thanh ((bai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang tai) OR (hang tai)) roi. hieu va cham soc va thanh ((bai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang tai) or (hang tai)) roi. hieu va cham soc va thanh ((bai cua) or (dai cua)) tre*.