Perhaps you should try some spelling variations:
trua cua » tru cua, trung cua, qua cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
tra cuu » tra cau, trau cua
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa
loc va » hoc va, luc va
va cam » va cham, va cac, va cao

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 cam ((tuc va) or (loc va)) hanh ((tra cuu) OR (trua cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu va cam ((tuc va) OR (loc va)) hanh ((tra cuu) OR (trua cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu va cam ((tuc va) or (loc va)) hanh ((tra cuu) OR (trua cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu va cam ((tuc va) or (loc va)) hanh ((tra cuu) OR (trua cua)) tre*.