Perhaps you should try some spelling variations:
thu hoang » thu hoan, thi hoang, thu hong
pham duy » pham duc
thu hang » thi hang, thuc hanh, thu huong
so sanh » do sanh
va hanh » van hanh, va thanh, va danh
hieu va » hieu qua
van hoi » van hoa, van hoc, van hoe
duy va » duy vat, duy van, day va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ((thu hoang) OR (thu hang)) van hoi. ((hieu va) or (lieu va)) pham duy va hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ((thu hoang) OR (thu hang)) van hoi. ((hieu va) OR (lieu va)) pham duy va hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ((thu hoang) OR (thu hang)) van hoi. ((hieu va) or (lieu va)) pham duy va hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: so sanh ((thu hoang) OR (thu hang)) van hoi. ((hieu va) or (lieu va)) pham duy va hanh vi cua tu*.