Perhaps you should try some spelling variations:
manh thang » danh thang, minh thang, nhanh thang
thang tai » hang tai, tang tai, thanh tai
hieu van » hieu va, thien van, lieu va
dua tren » dung tren
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cao » van dao, van bao, van hao
cao suc » cao su, cao duc
cua te » cua tu

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) or (su sach)) ky nang xa hoi. hieu van cao suc manh thang tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu van cao suc manh thang tai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu van cao suc manh thang tai ((dua tren) or (cua te))*.