Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
cua te » cua tu
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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) or (hoc sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (hoc sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh tai cua te*.