Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ly ((lang xa) OR (lang ha)) hoi. hieu ve cam xuc ((van hanh) or (van thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly ((lang xa) OR (lang ha)) hoi. hieu ve cam xuc ((van hanh) OR (van thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ly ((lang xa) OR (lang ha)) hoi. hieu ve cam xuc ((van hanh) or (van thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ly ((lang xa) OR (lang ha)) hoi. hieu ve cam xuc ((van hanh) or (van thanh)) vi cua tre*.