Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
tu sach » su sach, te sach, tu cach
cuu tre » cua tre, cau tren, cau treo
va cuu » va cau, va chu, va huu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (tu sach)) thien ((nang ma) OR (sang ma)) hoi. lieu va cac xuc van hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) thien ((nang ma) OR (sang ma)) hoi. lieu va cac xuc van hanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) thien ((nang ma) OR (sang ma)) hoi. lieu va cac xuc van hanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) thien ((nang ma) OR (sang ma)) hoi. lieu va cac xuc van hanh va cuu tre*.