Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thanh van » thanh san, thanh toan, thanh phan
lang hoa » hang hoa, lang ha, nang hoa
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
hieu le » hieu ve, hieu he, hieu ly
le nam » ly nam, he nam, le na

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 ky lang hoa hoc. hieu le nam thuc van ((thanh tai) or (thanh van)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang hoa hoc. hieu le nam thuc van ((thanh tai) OR (thanh van)) su triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky lang hoa hoc. hieu le nam thuc van ((thanh tai) or (thanh van)) su triet*.