Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
hieu van » thien van, hieu ve
va thanh » gia thanh, ban thanh, va tinh
gian cua » gian xu, ban cua
hoc sac » hoc sach, hoc cac, hoc mac
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky nang xa hoi. ((((hieu van) or (hieu va))) or (lieu va)) cam xuc va thanh gian cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang xa hoi. ((((hieu van) OR (hieu va))) OR (lieu va)) cam xuc va thanh gian cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang xa hoi. ((((hieu van) or (hieu va))) or (lieu va)) cam xuc va thanh gian cua tre*.