Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
hanh sai » hanh san, hanh tai, danh sai
va trien » va truyen, va thiet, va tuyen
te sach » toc sach
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
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: te sach y lang xa hoi. hieu van nam thuc dan hanh sai ((va trien) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. hieu van nam thuc dan hanh sai ((va trien) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu van nam thuc dan hanh sai ((va trien) or (cua te))*.