Perhaps you should try some spelling variations:
thien van » thi van
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hanh tai » thanh tai, hang tai, han tai
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
tuc va » thuc va, truc va, tuc xa
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 (hoc sach))) or (dac sac)) ky nang xa hoi. thien van nam tuc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((toc sach) OR (hoc sach))) OR (dac sac)) ky nang xa hoi. thien van nam tuc va hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((toc sach) OR (hoc sach))) or (dac sac)) ky nang xa hoi. thien van nam tuc va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((((toc sach) OR (hoc sach))) or (dac sac)) ky nang xa hoi. thien van nam tuc va hanh tai cua te*.