Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
sang tai » hang tai, sang tao, tang tai
tu sach » su sach, te sach, tu cach
tu phat » su phat, te phat, xu phat
vai cua » dai cua, hai cua, lai cua
su chat » su phat, du chat, so chat
tai hoi » tai khoi, dai hoi, tai hai
ky sang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

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)) ky sang tai hoi. hieu ((su chat) or (tu phat)) xuc va thanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky sang tai hoi. hieu ((su chat) OR (tu phat)) xuc va thanh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky sang tai hoi. hieu ((su chat) or (tu phat)) xuc va thanh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky sang tai hoi. hieu ((su chat) or (tu phat)) xuc va thanh vai cua tu*.