Perhaps you should try some spelling variations:
thi hong » thi cong, thi phuong, thi hanh
nam thuc » nam thuoc, am thuc, nam thu
dinh vai » dinh van, dinh vi, dinh va
va triet » va thiet, va trien, ve triet
te sach » toc sach
hieu ha » hieu hoa, hieu va, hieu ca
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((thi thanh) or (thi hong)) cau hoi. hieu ha nam thuc va dinh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thi thanh) OR (thi hong)) cau hoi. hieu ha nam thuc va dinh vai va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((thi thanh) or (thi hong)) cau hoi. hieu ha nam thuc va dinh vai va triet*.