Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
phan tai » pham tai, nhan tai, phan thi
nang xa » nang x, lang xa, nang ma
van cam » van nam, van cau, van dam
van lam » van nam
va phan » van phan, va phat, va phap
tai cua » thai cua, tai cuc, tri cua
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)) ky nang xa hoi. hieu ((van cam) OR (van lam)) duc va phan tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang xa hoi. hieu ((van cam) OR (van lam)) duc va phan tai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ky nang xa hoi. hieu ((van cam) OR (van lam)) duc va phan tai cua te*".