Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh lap » thanh san, phan lap, thanh van
tu cach » tu cac
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
cach tu » cach thuc
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach tu ((nang xa) or (nang ma)) hoi. hieu ve cam duc va ((thanh lap) OR (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu ((nang xa) OR (nang ma)) hoi. hieu ve cam duc va ((thanh lap) OR (thanh hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tu ((nang xa) or (nang ma)) hoi. hieu ve cam duc va ((thanh lap) OR (thanh hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cach tu ((nang xa) or (nang ma)) hoi. hieu ve cam duc va ((thanh lap) OR (thanh hai)) cua tre*.