Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh lai » thanh hai, thanh lap, thanh loi
thu sach » tu sach, thuat sach, thuoc sach
so sanh » do sanh
nang ho » nang hoc, nang co, tang ho
ve pham » v pham, ve phan, ve phat
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
ho hoi » hoc hoi, hoa hoi, hoi hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (so sanh)) ky nang ho hoi. hieu ((ve pham) OR (vi pham)) duc van thanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (so sanh)) ky nang ho hoi. hieu ((ve pham) OR (vi pham)) duc van thanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (so sanh)) ky nang ho hoi. hieu ((ve pham) OR (vi pham)) duc van thanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (so sanh)) ky nang ho hoi. hieu ((ve pham) OR (vi pham)) duc van thanh lai cua te*.