Perhaps you should try some spelling variations:
thuat thanh » thuan thanh, thuat than, thuat toan
lay nang » may nang, day nang, luan nang
hang tai » hang va, dung tai
tai cua » thai cua, tai cuc, tri cua
va hang » van hang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
ly nang » ky nang, ly hang, ly vang
ve cac » va cac, vien cac
loc va » hoc va, luc va
ve cau » ke cau, va cau, le cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat thanh ((lay nang) or (ly nang)) x hoi. hieu ((ve cau) OR (ve cac)) loc va hang tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat thanh ((lay nang) OR (ly nang)) x hoi. hieu ((ve cau) OR (ve cac)) loc va hang tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat thanh ((lay nang) or (ly nang)) x hoi. hieu ((ve cau) OR (ve cac)) loc va hang tai cua tre*".