Perhaps you should try some spelling variations:
hieu hieu » hien hieu, hieu hien, thien hieu
hieu cac » hieu luc, hieu va, hieu van
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
cac bo » bac bo, cac co
bo van » vo van, so van, do van
cua te » cua tu

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 ty ((lang xa) or (nang x)) hoi. hieu hieu cac bo van ((hanh tai) OR (hang tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (nang x)) hoi. hieu hieu cac bo van ((hanh tai) OR (hang tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((lang xa) or (nang x)) hoi. hieu hieu cac bo van ((hanh tai) OR (hang tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) or (nang x)) hoi. hieu hieu cac bo van ((hanh tai) OR (hang tai)) cua te*.