Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
nang mai » nang ma, nang tai, lang mai
tham xuc » tham nuoc, tham thuc, cam xuc
doi cua » dai cua, hoi cua
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
sach va » sach xa, sach ha, sach dao
cua tre » cua te, cuu tre, cua triet
sach v » sach y, sach 2, sach vay

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach v) OR (sach va)) nang mai hoi. hieu va ((tham xuc) or (pham duc)) van hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach va)) nang mai hoi. hieu va ((tham xuc) OR (pham duc)) van hanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) OR (sach va)) nang mai hoi. hieu va ((tham xuc) or (pham duc)) van hanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) OR (sach va)) nang mai hoi. hieu va ((tham xuc) or (pham duc)) van hanh doi cua tre*.