Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
toc sach » thuoc sach, nuoc sach, toc san
hieu van » hieu va, thien van, lieu va
doc sach » nuoc sach, dac sac, bo sach
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
nam thuc » nam thuoc, am thuc, nam thu
tai cua » thai cua, tai cuc, tri cua
thuc va » thuc vat, thuc dan, thuc day
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
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: ((((toc sach) or (doc sach))) or (hoc sach)) ky dang xa hoi. hieu van nam thuc va thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((toc sach) OR (doc sach))) OR (hoc sach)) ky dang xa hoi. hieu van nam thuc va thanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: ((((toc sach) or (doc sach))) or (hoc sach)) ky dang xa hoi. hieu van nam thuc va thanh tai cua te*.