Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
tu sach » su sach, te sach, tu cach
van cam » van nam, van lam, van cau
ty nang » ky nang, ty xang, ty hang
cam duc » cam xuc, cao duc, pham duc
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ((ty nang) or (vu quang)) x hoi. hieu van cam duc va thanh va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ((ty nang) OR (vu quang)) x hoi. hieu van cam duc va thanh va cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ((ty nang) or (vu quang)) x hoi. hieu van cam duc va thanh va cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ((ty nang) or (vu quang)) x hoi. hieu van cam duc va thanh va cua tu*.