Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nhan luc » nang luc
va triet » va thiet, va trien, ve triet
van tuan » van quan, van ban, anh tuan
tuan vi » quan vi, luan vi, quans vi
luc van » luoc van, luu van, duc van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
tang ho » tang cho, tung ho, tang ha
va nhan » van nhan, ca nhan, va phan

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 ty ((nang x) or (tang ho)) hoi. hieu va nhan luc van tuan vi ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang x) OR (tang ho)) hoi. hieu va nhan luc van tuan vi ((va triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang x) or (tang ho)) hoi. hieu va nhan luc van tuan vi ((va triet) or (su triet))*.