Perhaps you should try some spelling variations:
hoach tri » hoach toi, hoach hoi, hoach thu
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa khoi » khoa hoi, khoa khoa, thoat khoi
nuoc sach » nguoi sach, hoc sach, cuoc cach
sach tren » sach tien, sach tranh
pho thong » he thong
tri thuc » tri tue
dac khoa » da khoa, dai khoa, dau khoa
khoa pho » khoa phu, khoa khoa, khoa phau
tren tu » tren tau, tran tu, tre tu
tu dac » thu dac, tu cac, tu dat
khong » phong

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 tri thuc hanh khoa khoi khong ) or ( nuoc sach tren tu dac khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach tri thuc hanh khoa khoi khong ) OR ( nuoc sach tren tu dac khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach tri thuc hanh khoa khoi khong ) or ( nuoc sach tren tu dac khoa pho thong ))*.