Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh tri » thanh tri, hanh tai, hanh trinh
tri cau » tri cac, tri dau, trinh cau
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
loc va » hoc va, luc va

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