Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
hanh va » hang va, hanh vi
xac van » cac van, tac van, sac van
sach ty » sach tu, sach thu, xach tay
dao xac » dan xac, dao cac, dau xac
sang ma » tang ma, nang ma, sang tao
ma hoi » mai hoi, xa hoi, ma hoa
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) OR (sach y)) sang ma hoi. hieu van dao xac van ((hanh tai) or (hanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) sang ma hoi. hieu van dao xac van ((hanh tai) OR (hanh va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach y)) sang ma hoi. hieu van dao xac van ((hanh tai) or (hanh va)) cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach y)) sang ma hoi. hieu van dao xac van ((hanh tai) or (hanh va)) cua te*.