Perhaps you should try some spelling variations:
chieu chien » thien chien
hieu hien » bieu hien, dieu hien, dieu khien
va thanh » gia thanh, ban thanh, va tinh
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
su sach » so sach, vu sach
cac lao » ca lao, cac loai, cac giao
nang xa » nang x, lang xa, nang ma
lao va » tao va, cao va, bao va
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. ((hieu hien) or (chieu chien)) cac lao va thanh ((vai cua) OR (lai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. ((hieu hien) OR (chieu chien)) cac lao va thanh ((vai cua) OR (lai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. ((hieu hien) or (chieu chien)) cac lao va thanh ((vai cua) OR (lai cua)) te".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((hieu hien) or (chieu chien)) cac lao va thanh ((vai cua) OR (lai cua)) te*.