Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
cam luoc » cam xuc, tom luoc, cam lo
luoc van » luoc can, luoc va, luc van
van cam » van nam, van lam, van cau
vai cua » hai cua, lai cua, bai cua
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((y nang) OR (v nang)) xa hoi. hieu van cam luoc van thanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((y nang) OR (v nang)) xa hoi. hieu van cam luoc van thanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((y nang) OR (v nang)) xa hoi. hieu van cam luoc van thanh ((vai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((y nang) OR (v nang)) xa hoi. hieu van cam luoc van thanh ((vai cua) or (dai cua)) tre*.