Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
sang ma » tang ma, nang ma, sang tao
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
duc van » duc tan, duc manh, duc phan
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 ((sang ma) or (lang xa)) hoi. hieu va cac ((duc van) OR (duc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((sang ma) OR (lang xa)) hoi. hieu va cac ((duc van) OR (duc va)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((sang ma) or (lang xa)) hoi. hieu va cac ((duc van) OR (duc va)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((sang ma) or (lang xa)) hoi. hieu va cac ((duc van) OR (duc va)) hanh vai cua tre*.