Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
mua ban » cua ban
lai cua » dai cua, hai cua, lai chau
qua ban » cua ban, qua quan
nang ma » tang ma, sang ma, nang cao
tu san » thu san, tu ban, tu can
tu sac » tu sach, tu cac, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu san)) ky nang ma hoa. hieu van nam ((mua ban) or (qua ban)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang ma hoa. hieu van nam ((mua ban) OR (qua ban)) thanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu san)) ky nang ma hoa. hieu van nam ((mua ban) or (qua ban)) thanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu san)) ky nang ma hoa. hieu van nam ((mua ban) or (qua ban)) thanh lai cua tre*.