Perhaps you should try some spelling variations:
chau tren » chay tren, cu tren, dau tren
cau trung » cau truong, cac trung, cao trung
cau tren » cu tren, dau tren, ca tren
va phap » va phat, ban phap
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va than » va thanh, van than, va phan
va cau » van cau, va cac, va dau

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 ky nang xa hoi. hieu va cau trung ((va than) or (va phap)) viet ((chau tren) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu va cau trung ((va than) OR (va phap)) viet ((chau tren) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu va cau trung ((va than) or (va phap)) viet ((chau tren) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu va cau trung ((va than) or (va phap)) viet ((chau tren) OR (cau tren))*.