Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
kho tang » cao tang
tang mai » tang ma, tang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
cac xuc » cac nuoc, chat xuc, cac cuoc
tu sach » thu sach, su sach, tu cach
hieu va » lieu va, hieu qua
te sach » toc sach
buu tre » cuu tre

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) or (te sach)) kho tang mai khoi. hieu va ((cac xuc) OR (cam xuc)) van hanh tai buu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) kho tang mai khoi. hieu va ((cac xuc) OR (cam xuc)) van hanh tai buu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) kho tang mai khoi. hieu va ((cac xuc) OR (cam xuc)) van hanh tai buu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) kho tang mai khoi. hieu va ((cac xuc) OR (cam xuc)) van hanh tai buu tre*.