Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, phap tieng
sach trien » sach tien, sach tren, sach thieu
trien thuc » trien thuoc, tren thuc, trien thuat
hoach hoi » hoc hoi, hoach ha, sach hoi
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa phap » khoa phau, khoan phai, khong phap
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
pho thong » he thong
khoa pho » khoa phu, khoa khoa, khoa phau
tu hanh » du hanh, lu hanh, thuc hanh
te sach » toc sach
hoi tu » loi tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach hoi tu hanh khoa phap thong ) or ( te sach trien thuc cach khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach hoi tu hanh khoa phap thong ) OR ( te sach trien thuc cach khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach hoi tu hanh khoa phap thong ) or ( te sach trien thuc cach khoa pho thong ))*.