Perhaps you should try some spelling variations:
phau chong » phap chong, pham chuong, phap phong
canh thoi » cach thoi, hanh thoi, anh tho
khoa phau » hoa phan, khoa kham, khoa than
thoi tap » toi tap, hoc tap, thoi dai
cuu toan » cuu hoan, cua toan, huu toan
chong do » chong doc, cuong do, chong co
nhan tai » hang tai, van tai, toan tai
ve canh » van canh, ve thanh
hoi van » hoi dan, hai van, hoi han
do xa » doi xa, do va, o xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ve canh thoi tap, nghien cuu toan khoa phau chong do xa ((hoi van) OR (hoi va)) nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ve canh thoi tap, nghien cuu toan khoa phau chong do xa ((hoi van) OR (hoi va)) nhan tai".
• Adding a wildcard symbol may retrieve word variants: ve canh thoi tap, nghien cuu toan khoa phau chong do xa ((hoi van) OR (hoi va)) nhan tai*.