Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thi nang » thi cong, ki nang, thi hanh
thuc van » thuc vat, thuc dan, thuc va
truc van » truc va, truc ban, truc dan
sach thi » sach thu, sach tai, sach thieu
hang di » hang doi, hang vi, hang dien
co sach » bo sach, cuon sach, hoc sach
hieu va » hieu qua
nang xa » nang x, lang xa, nang ma
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach thi nang xa hoi. ((hieu va) OR (lieu va)) cam ((truc van) or (thuc van)) hang di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach thi nang xa hoi. ((hieu va) OR (lieu va)) cam ((truc van) OR (thuc van)) hang di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach thi nang xa hoi. ((hieu va) OR (lieu va)) cam ((truc van) or (thuc van)) hang di cua triet*".