Perhaps you should try some spelling variations:
phat luc » nhan luc, phat huy, chat lua
thanh va » thanh van, thanh ha, thanh ve
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
luu tre » luu tru, cuu tre, luy tre
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty lang xa hoi. hieu va phat luc va ((thanh va) or (hanh va)) luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty lang xa hoi. hieu va phat luc va ((thanh va) OR (hanh va)) luu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang xa hoi. hieu va phat luc va ((thanh va) or (hanh va)) luu tre*.