Perhaps you should try some spelling variations:
thieu lang » hieu lang, thieu khang, thieu quang
hanh lai » hanh lam, hanh tai, thanh lap
thuc day » thuc dan, thuc vat
tu sach » thu sach, su sach, te sach
lai cua » dai cua, hai cua, lai chau
van cam » van nam, van lam, van cau
thi van » thi lan, thi hanh, thi nang
hoa hoi » khoa hoi, hoa hoc, hoa doi
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
ha hoi » ha noi, xa hoi, va hoi

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 thieu lang ((ha hoi) OR (hoa hoi)). thi van cam ((luc va) or (thuc day)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu lang ((ha hoi) OR (hoa hoi)). thi van cam ((luc va) OR (thuc day)) hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thieu lang ((ha hoi) OR (hoa hoi)). thi van cam ((luc va) or (thuc day)) hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach thieu lang ((ha hoi) OR (hoa hoi)). thi van cam ((luc va) or (thuc day)) hanh lai cua tre*.