Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang doc » nang luc
cau tren » cu tren, dau tren, ca tren
nang co » nang cao, nang noi, nang hoc
cac xuc » cac nuoc, chat xuc, cac cuoc
va danh » va dinh, va dan, va hanh
cho cau » cho cac, co cau, cho chu

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 y ((nang co) OR (nang doc)) hoi. hieu qua ((cac xuc) or (cam xuc)) va danh cho cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang co) OR (nang doc)) hoi. hieu qua ((cac xuc) OR (cam xuc)) va danh cho cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang co) OR (nang doc)) hoi. hieu qua ((cac xuc) or (cam xuc)) va danh cho cau tren".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang co) OR (nang doc)) hoi. hieu qua ((cac xuc) or (cam xuc)) va danh cho cau tren*.