Perhaps you should try some spelling variations:
kinh tai » hinh tai, dinh tai, kinh hai
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, su sach, tu cach
va kinh » va tinh, qua kinh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
cuc tre » duc tre, cua tre, cuu tre
ly nang » ky nang, ly hang, ly vang
te sach » toc sach
ve nam » he nam, va nam, le nam
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ((y nang) OR (ly nang)) ma hoi. hieu ve nam thuc va kinh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ((y nang) OR (ly nang)) ma hoi. hieu ve nam thuc va kinh tai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ((y nang) OR (ly nang)) ma hoi. hieu ve nam thuc va kinh tai cuc tre*".