Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
phan cua » than cua, phat cua, han cua
tai lang » tai cong, thi lan, tai san
nhan cua » nhat cua, nhan luc, nhan su
va thanh » gia thanh, ban thanh, va tinh
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
nam tuc » nam thuc, nam truc, nam tu
va nam » van nam, ha nam, va nay
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((tai lang) or (ky dang)) xa hoi. hieu va nam tuc va thanh ((phan cua) or (nhan cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tai lang) OR (ky dang)) xa hoi. hieu va nam tuc va thanh ((phan cua) OR (nhan cua)) te.
• Adding a wildcard symbol may retrieve word variants: toc sach ((tai lang) or (ky dang)) xa hoi. hieu va nam tuc va thanh ((phan cua) or (nhan cua)) te*.