Perhaps you should try some spelling variations:
thang di » hang di, tang di, thang loi
phuc van » thuc van, phuc va, chuc van
cau phuc » cau truc, chau phu, huu phuc
nang xa » nang x, lang xa, nang ma
tang da » tang dan, tang dam, tang ma
cua tre » cua te, cuu tre, cua triet
ky cau » ky chau, ke cau
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: hoc ((sach v) OR (sach 2)) nang xa hoi. hieu ky cau phuc van ((thang di) or (tang da)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach v) OR (sach 2)) nang xa hoi. hieu ky cau phuc van ((thang di) OR (tang da)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach v) OR (sach 2)) nang xa hoi. hieu ky cau phuc van ((thang di) or (tang da)) cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach v) OR (sach 2)) nang xa hoi. hieu ky cau phuc van ((thang di) or (tang da)) cua tre*.