Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
cac xuc » cam xuc, cac nuoc, chat xuc
lai cua » dai cua, hai cua, lai chau
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach vay
sach 2 » sach y

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 v) OR (sach 2)) lang xa hoi. hieu viec cac xuc ((va thanh) or (ban hanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach 2)) lang xa hoi. hieu viec cac xuc ((va thanh) OR (ban hanh)) lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) OR (sach 2)) lang xa hoi. hieu viec cac xuc ((va thanh) or (ban hanh)) lai cua tre*".