Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
cua tu » cua tuc, cua cu, cua te
cua su » qua su
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 ky nang x hoi. hieu va ((cam duc) or (cao su)) va thanh vai ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu va ((cam duc) OR (cao su)) va thanh vai ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu va ((cam duc) or (cao su)) va thanh vai ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu va ((cam duc) or (cao su)) va thanh vai ((cua tu) OR (cua su))*.