Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang cao » hoang cao, hang ca, hang cau
va hanh » van hanh, va thanh, va danh
bao luc » bao thuc
cao luc » cao duc, cao suc, cau luc
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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 ty ((hang cao) OR (nang cao)) hoi. hieu qua ((cao luc) or (bao luc)) va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((hang cao) OR (nang cao)) hoi. hieu qua ((cao luc) OR (bao luc)) va hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((hang cao) OR (nang cao)) hoi. hieu qua ((cao luc) or (bao luc)) va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((hang cao) OR (nang cao)) hoi. hieu qua ((cao luc) or (bao luc)) va hanh vi cuu tre*.