Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
doi cua » dai cua, hoi cua
va hanh » va danh, ban hanh, dao hanh
hieu ke » hieu kem, chieu ke, hieu ky
cau tuc » cau truc, cau tu, cau luc
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
ke cau » ket cau
cua su » qua su

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 y nang xa hoi. hieu ke cau tuc ((((va hanh) OR (va thanh))) or (van hanh)) doi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu ke cau tuc ((((va hanh) OR (va thanh))) OR (van hanh)) doi cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu ke cau tuc ((((va hanh) OR (va thanh))) or (van hanh)) doi cua su".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu ke cau tuc ((((va hanh) OR (va thanh))) or (van hanh)) doi cua su*.