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