Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tai cua » thai cua, tai cuc, tri cua
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
han tai » hang tai, nhan tai, van tai
van han » van hanh, van phan, van nhan
duc van » duc va, duc tan, duc manh
va cam » va cham, va cao, va cai
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: ((te sach) OR (toc sach)) ly nang xa hoi. lieu ((va cam) or (va cac)) duc van han tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ly nang xa hoi. lieu ((va cam) OR (va cac)) duc van han tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ly nang xa hoi. lieu ((va cam) or (va cac)) duc van han tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ly nang xa hoi. lieu ((va cam) or (va cac)) duc van han tai cua te*.