Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
hieu hien » bieu hien, dieu hien, chieu chien
cua viet » ca viet, hoa viet, cua vat
thu sach » thuat sach, thuoc sach, thu hoach
nang dai » nang dau, nang tai, lang dai
dai hai » dai han, dai hoi, dai tai
cac xuc » cac nuoc, chat xuc, cac cuoc
vai cua » dai cua, hai cua, lai cua
tu sach » su sach, te sach, tu cach
y nang » ky nang, ly nang, v nang

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)) y nang dai hai. hieu hien ((cac xuc) or (cam xuc)) ban thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang dai hai. hieu hien ((cac xuc) OR (cam xuc)) ban thanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang dai hai. hieu hien ((cac xuc) or (cam xuc)) ban thanh vai cua viet*.