Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cham cuu » cap cuu, chat cua
chat cuu » chat huu, chat cua, cap cuu
trang ha » trang va, trung ha, tang ha
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
tang xa » trang xa, tang ma, lang xa
vai va » mai va, dai va, hai va
thiet » thieu

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 ((tang xa) or (trang ha)) hoi. hieu va ((chat cuu) OR (cham cuu)) va hanh vai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((tang xa) OR (trang ha)) hoi. hieu va ((chat cuu) OR (cham cuu)) va hanh vai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((tang xa) or (trang ha)) hoi. hieu va ((chat cuu) OR (cham cuu)) va hanh vai va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((tang xa) or (trang ha)) hoi. hieu va ((chat cuu) OR (cham cuu)) va hanh vai va thiet*.